I Googled Peeta Mellark and the others you mentioned and they are all listed as straight and monogamous except this Daryl who is suspected to be asexual. I don't know your other poly pairings, it Wade is pansexual that's fine, but Wolverine isn't. He's haunted by Jean Grey. Get real
Honestly I don't know if you are just a troll at this point or a kid and/or just someone who hasn't been in fandom spaces very long. So I'll be very nice and just give you examples, like you failed to do.
I don't know what you looked at when you Googled these characters, but if you are just looking at a Wikipedia page that isn't evidence since anyone can edit those pages at any time that they want.
First up: " I Googled Peeta Mellark"
If you Google "is Peeta Mellark queer?" The third link down is a Screenrant article titled "The Hunger Games: 10 Characters That Easily Could Have Been Made LGBT+" <-If you click this link it will bring you to that very article.
And in that article it says this:
"Peeta Mellark is clearly very in love with Katniss, but just because he’s interested in one person doesn’t mean he couldn’t be LGBT. He could easily be bisexual as who you fall in love with doesn’t change your sexuality.
Peeta is very open with his soft, sensitive side, and he doesn’t have many toxic masculinity traits. He seems like someone who would be very comfortable being affectionate with men or women."
So, just because a character seems "straight" based on who they are with or have a crush on doesn't mean that they are for a fact straight.
I don't know why you are even mentioning characters you seem to know nothing about or have ever watched or read anything they are in. Your response of "this Daryl" suggest to me that you have never watched The Walking Dead. But I assume base on your presumptions on other characters that you took a look and saw Rick Grimes being with women and just assumed he was straight. so if you Google is Rick Grimes queer the ONLY thing you get about him being heterosexual is from the AI Overview, which states at the bottom of it "Generative AI is experimental."
And it includes two articles that have nothing to do that confirms that, one is "‘The Walking Dead’: LGBT Visibility Needs Improvement" and the second being "Rick and Michonne’s Best Episodes of The Walking Dead". Which neither one of these articles prove or discus Rick Grimes sexuality.
Third: "If Deadpool is Pansexual."(You put it but I assume you meant "if")
I'm just going to link these two articles that go into the many details and include the many examples of Deadpool's pansexuality. (Also these articles pop up if you Google what is Deadpool's sexuality")
Article one: Deadpool: the pansexual superhero who has never had a non-heterosexual experience.
Article two: deadpool is pansexual. deal with it.
And finally the big one: "but Wolverine isn't. He's haunted by Jean Grey. Get real."
If you Google "what is wolverine's sexuality?" the very FIRST article that pops up (and even better is above that article it states that "An AI overview is not available for this search.") is an article titled "Every Love Interest Of Wolverine, Ranked." And in this article it gives you all the examples of these love interest.
Including a VERY important one. The article says:
"Logan's sexuality in this alternate universe doesn't seem so surprising in light of possible developments in the Dawn of X relaunch. In those X-Men comics, it appears Wolverine is in a polyamorous relationship with Cyclops and Jean Grey."
If you don't believe me from this article here is a different article titled "X-Men: Cyclops and Wolverine Are Definitely Having Sex On The Moon"
In this article you find a more detail and even more examples of the relationship.
The first sentence even being:
"The X-Men franchise's Krakoan Era was groundbreaking in many ways – but one of its earliest, most shocking recontextualizations of classic X-lore involved the idea that Cyclops, Jean Grey, and Wolverine are in a polyamorous relationship."
So no, Wolverine isn't straight, and it's not him being "haunted by Jean Grey."