hm, i actually like the chapter quite a bit, you cannot have action all the time, the story and setting needs to be set up properly and any big improvements should be at least this flashed out to show how an MC got there and make it believeable.
thus was a well done filler chapter cause it explained the reasons for itself in the chapter while also adding some small amount of content which you could've tried to milk a whole chapter out of it but those chapters would've been bland af
"If something has happened to my home or those that reside within I will kill hela and Odin... or try to at least"... a few moments later "I won't attack them... yet (never)" protagonist can't be trusted. He speaks with a silver tongue.
I liked, starting to get curious how he will enhance his soul, maybe you can link the sanctuary to his soul somehow and he gets a passive boost as time passes (he could also get a active one if the inhabitants agree to lend him their power) anyway as time passes his soul gets passively stronger.