Activate default apple app control strip by clicking keyboard button

Hi.

I was looking for an answer to my question on the forum and in google yet couldn't find any solution. I would like to create a custom touchbar preset but I still like default apple app control strip which pops up when you use apps like Ps or Ai etc. I came up with an idea to activate app control strip by clicking on Fn button once and show F keys by holding Fn button. In short i would like to switch between default app control strip and BTT preset by clicking one button. If this is possible, could someone explain how to set up such feature and if not what would be the best workaround for my purpose. Thanks.