Packaged empty level has terrible fps on decent laptops/PCs

Whenever i package a project, i get 100+ fps but lower (but not like low-end) performance PCs struggle to play it. The issue is, it doesn’t matter what the project is. I tried packaging with a small low poly open world, a very short corridor ball rolling game and literally with the third person template example map. (Each as different projects) I keep getting the same horrible performances when i play them on gaming laptops or 6 year old gaming PCs that still counts very decent.

Empty third person template map used one of the laptops gpu up to %99 and had like 10 fps. Like, what???

I am almost sure i am missing something about packaging since the content of the project did not change anything.
What am i doing wrong? Do i overlook a little tick box again?