DV switch allows you to add PTT buttons for many mics. But to do it you need to set it up with a PTT code. The code is different for each device and you can also map it to unused buttons on your phone.
To find out your code you need to go to the app store nd download Button Mapper
IN the app store or by this link https://buttonmapper.app/
Click add button and then press your PTT button it will give you a code.
Go to dv switch and enter this code under PTT and thats it.
Remember to save settings in DVswitch you have to make a donation.
Pull down the bar to the bottom in config and click on all access.