If you're using Foundry v10 with the latest version of the PF2e system, there is an import module supporting your 'Crown' PDF (https://foundryvtt.com/packages/pf2-pdf-en-import).
It will import map,s using the pdf images, as well as all room entries. It will pick up the adventure's creatures from the PF2e foundry system compendiums, and assign them images and tokens.
The only things the module can't fix is the secret door symbols printed on image maps. You'll have to fix it by yourself with a software, or use community maps.