i have a doubt with performance and scenes

hi group, good day, i have a question for you… I’m developing a game for android in unity 3D it’s a project like Mario, and you have to avoid some objects that the game throws; other objects are meant to be as platforms; all of the objects are not random, and the reason of this is because is like a Mario game… and have like 10 or 15 levels and yes is for android so a colleague asked me "how are you going to fit 300 game objects into your scene without losing performance of your device, something that i couldn’t answer because I’m new in the world of programming and the 300 objects are just for one level of 10 or 15 depending of the client so my question here is the same, does anybody know how many objects can fit in a scene without losing performance? or does any of you know how to spawn objects in a scene but in order?

Exactly as many angels as you can fit on the head of a pin.

Iterate while you develop, do experiments on the ACTUAL HARDWARE you are intending to use, and if you see a performance issue, the ONLY valid answer is to attach the profiler with Windows → Analysis → Profiler and see what is slowing you down.

alright i’ll check it and see if the performance deplets. thanks