A/C compressor or blend door actuator problem

You are correct that this could be either of these issues. So the best thing to do is check the compressor first.

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

We need to turn the A/C on and see if the compressor is engaging under the hood.

We need to check the pressures next. Hook up a gauge set and test it with the A/C off engine running and then turn the A/C on and see what the pressures do.

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Once we know the pressures and that the compressor is engaging we will have a better idea if this is a compressor issue.

Here is a guide on blend door replacement if we have to go that way:

https://youtu.be/tY6M92fA2ug

Lastly below is a chart that will help with possible issues with the pressures. Let me know what you find with this and we can go from there. Thanks