assuming season 2 starts where season 1 left off, there's two ways the alt-TVA + nobius (mobius he meets in the finale) storyline can go, that being:

1. it's only used as a device to show that sylvie's choice runs so deep it even effects the TVA, which is supposed to be a place outside of time. now that it's been established, loki gets back to his original TVA and his mobius within the first episode, maybe two.

2. loki is very far from home, and will end up getting acquainted with nobius in the time it takes him to get back to his mobius, probably getting mixed up in solving things in the alt-timeline along the way. here he might be with nobius until mid, end season.

if nobius and loki do end up getting the breathing room they'd need to get acquainted, there is a lot of potential there for both some sweet moments and a lot of very good angst.

nobius doesn't just not know what mobius and loki have been through, he doesn't know loki by face at all. with this we can assume he knows NOTHING of his past.

mobius gave him a baseline to work with, he could open up to him because mobius already knew everything he'd ever done, and still understood him. still cared about him.

what will it be like for loki now, being faced with this stranger who looks like the man who trusts him through all his faults, but isn't him. how can he be sure that anything he says to nobius about what he's done will now not taint the way he sees him, treats him ? especially if nobius reluctantly trusts loki as a stranger, will he now fear actually opening up to him, lest it ruin the flimsy acquaintance they have ?

i don't think loki has had the proper time or energy to really, genuinely think about what mobius means to him. but now ? in nobius, he's got the perfect slate for analyzing why his mobius makes him feel the way he does. why it hurts to see nobius without the recognition in his eyes. why he's scared of nobius disliking him even though he's technically a stranger. why he wants to get back to mobius as badly as he does.