Please post your System Information as Lightroom Classic (LrC) reports it. In LrC click on Help, then System Info, then Copy. Paste that information into a reply. Please present all information from first line down to and including Plug-in Info. Info after Plug-in info can be cut as that is just so much dead space to us non-Techs.
The screenshot clearly shows that this is Lightroom Classic 11 (masking icon), and if this is a Mac M1 then the GPU should be fully supported. Where are your images located? Are they on an external drive? In that case it could be the cable to the drive.