Synced deleting of photos on my mobile?

Hello to the community,

I have a question about deleting photos:

I'm using Lightroom Mobile on my Android phone and Lightromm Classic on my Windows PC. The photos I take with my phone are automatically imported from LR Mobile and synced to pc via the Adobe Cloud. There I process them and, if necessary, store them locally. Photos that I no longer need I delete from LR. These are then deleted by the syncronization also in LR Mobile on the mobile phone.

Now the problem: The photos are not deleted from the memory of the phone. I also don't find an option in this regard. So I keep my cloud storage under 20GB, but the phone overflows! How to solve the problem?!?

Thank you for any hint!

Best regards, Hannes