You dead when you back from end(in chat it will say fall from high place)

In minecraft 1.17 (last beta)

If Back from end you will summon normally but with out your stuff (only level and take it like when you dead and back )and you can't get any thing 

Note- in creative you summon normally with all stuff 

In chat it says fall from high place 

Some time game will stop in In dead screen 

But with out options (there is words say world generating)