Troube with Collabora wopi-allowlist in Nextcloud AIO behind Cloudflare tunnel

I’m having trouble with Collabora office setup. I set up the Nextcloud AIO behind Cloudflare tunnel and cannot open any documents with Collabora. The Github guide for Nextcloud AIO suggests the following:

It is known that the in AIO included collabora (Nextcloud Office) does not work out of the box behind Cloudflare. To make it work, you need to add all Cloudflare IP-ranges to the wopi-allowlist in

However I’m not able to find this wopi-allowlist in my Nextcloud Collabora (richdocuments) settings. Am I missing something or is the guide outdated?

I tried looking for a config file for this but wasn’t able find one.