Select sound in- and outputs individually

I often use a Bluetooth headset for calls and online conferences on my IPhone and IPad, however there is a big issue for me personally. As soon as my headset turns on the microphone, the sound quality gets greatly reduced, due to the bandwidth limitations of Bluetooth. Now on windows, I can just select, that my PC should use a different microphone thus the sound quality stays good, but on iOS/IPadOS you can only choose to either use the mic and speaker combo of the device or the headphones.

Does anybody know if there is a way to force iOS to only use my headphones as headphones and not as a headset?

The only workaround I found so far is using an adapter and headphone cables which I would rather not have to do.

Thank you!