ALL MOBS ARE COLLECTABLE... PLEASE

I've been watching a lot of minecraft YouTube content and I've noticed the mob collection videos of creater's gets crazy amount of views, in such videos the player can't collect every mob in game making it so unsatisfactory, [ Mobs like vexes and wandering traders despawn even after naming them with nametags & baby mobs like tadpoles eventually grow up making them impossible to collect] I suggest addition of an new item named "Echo Nametags" crafted with echo shards and nametags, after naming mobs with echo nametags, the mob should not grow up nor despawn [including vexes and wandering traders] giving more use to echo shards and this can be a new advancement 'name every mob with echo nametags' thus making the game more explorable EDIT:- Nether mobs like piglins, hoglins, etc change form after transported to overworld, echo shards should prevent this from happening too.. and to market this change mojang should go with Pokemon's "collect them all" approach...