In reply to Dan.

Hi, I also use WP-Rocket. I’m no expert but from what I’ve read elsewhere and practiced on my own website you can use both BUT – disable the page cache, disable the Cloudflare addon within WP-Rocket and install the official Cloudflare plugin. Within the Cloudflare pugin setting, enable APO and also select purge everything on update. To disable WP-Rocket page caching, there is a small addon plugin you can get from the developers website (wp-rocket no cache).
It’s working great on my site, for the past 10+ days (touch wood).