Я полностью прошел сюжетный режим,и я застрял на 49 дне там,решил начать новую игру в бесконечном режиме,скажите пожалуйста,могут ли прийти ариралы в бесконечном режиме

Endless mode is missing many of the story mode events and a fair amount of content, it is the halfway point between story and ambient.
You should still get random+signal events in the story mode even if days aren't ticking up for some reason, and there is the additional content of ariral interactions and unique story equipment, no need to play endless.