How can I use my tablet with my phone?

I've had a XP-pen deco 1v2 for a while and I just learned that I can use it on my phone with the right adapter.

As of now I don't know quite how to use it as I don't know how to use it as a sort of pointer nor what apps can be used to draw on Android phones.

If anyone has some tips I would appreciate it a lot cause my PC got bricked and I'm a few months away from being able to get it fixed or replaced so my phone will have to do for now.