For the best video taking:
For the best video you will want a stabilization gimbal. This one is compatible with your iphone 13 mini
This selfie stick / tripod combination can remove the phone clamp and the 1/4″ post can screw into the base of the gimbal. Or can be used with it’s own phone clamp.
The other item I would suggest is one of these octopus tripods. It will work with the gimbal or by itself with the phone clamp. It will allow you to attach or hang your phone from a lot of uneven places.
Audio Mixing
There are a lot of mixing boards that are cheaper. But if you want to record at 192 bit rate and not have a podcast level audio then you need something that has good internals.
These Anker Soundcore Life Q20 Hybrid Active Noise Cancelling Headphones are wireless with a built in mic. They also have a wired mode so you could use them as studio headphones for mixing or recording.
Same thing but from SENNHEISER
This is the headset I use. It’s wired, but has amazing sound quality. You would need an adaptor to run it to your phone or laptop. Those are in my older headphone post.
February 2023 Updates:
This is a WiFi dongle with a high gain antenna. It will help you be able to get better connection to a router or access point that is further then your stock antenna wants to connect to.
You will need a USB C to USB adaptor. There is one on the Port Adaptor you have or you can get one of these smaller units.
This is just a version of the above adaptor that has a short cord to give you the option to have it a little further away from the notebook.