Can't find perpetual activation key for Parallels Desktop for Mac from 2023

Hi,
My Mac got very corrupted, so I needed to reinstall everything. I had to upgrade to Sequoia 15.5 for software compatibility purposes and now need to reinstall Parallels, but I need Parallels 20 for Sequoia compatibility.
My original purchase from late May 2023 was for Parallels 18.3 (or close to it).
I have all my data backed up but I cannot fine the original activation key anywhere in old emails, though I do have the original "Activate your Parallels account" email. I would I have received that activation key if it didn't come by email? I also cannot find an email with the receipt for the purchase, though it does show in my Parallels online account.
More importantly, how do I get a updated perpetual license key for Parallels 20 if I can't find my original v18 key?
Thank you very much.
Regards,
Andy