They have kind of done this when you download planes. It will give you a potential lag warning and won't let you download some planes.

Its not something the devs can control, the games running speed is limited by your devices small processor "the thing that makes your game think and do things" obviously since a phone, kindle, tablet, etc is smaller than a full sized computer, it runs slower. Therefore it either needs a bigger CPU. And of you're a big engineering need like my friend, you can rip the cpu out of your device, and replace it with a faster one.

@ThatOnion it is possible and controlled by the developers, in my point of view they can downgrade graphics or let's say add a new graphic setting preset called "Ultra low" That way the graphics are potato but the game runs smoothly .....this is how android works.

Also The developers set a part download limit, i have samsung J7 prime which is powerful device that runs 500 parts air planes without lag on almost high settings so it is possible for me to run a creation of 800+ parts on the lowest setting preset with the lowest graphics but the site wont allow me to download 800+ parts creations like Sunfire's MLRS ..i simply can't
less lag can be achieved ..the game should detect the specs and enough available RAM to run the game and set the right graphics ... even if it gets pixel quality ....and in android resolution affects games more effectively than on PC ..it gets blury but it works so the developers should also add Resolution setting

Hey, maybe they can't control this, quit blaming it on the devs and put some effort into trying to understand why. there isnt a button that says 'remove lag for android and ios' so deal with it