Solved with this solution. It would only work over 80 and 443.
Lighttpd was using port 80 for pihole. Back when I set it up you could change the server port but it would be overwritten every time pi hole was redeployed, hence why I didn’t just change this in the first instance. They seem to have updated it so that editing the .conf and changing the port number will persist.
I should have said in the main text, I have something else on port 80 and I though best practice was not to expose 80 or 443?
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I have the Silverstone GD-08 case that can fit 12 hard drives. It’s an inexpensive solution for a dedicated htpc/media server. Even managed to fit in an RX 6600 so my wife can play low spec games on the tv.
Then all you need is a pcie expansion card as others suggested.
Yup wouldn’t work over any other ports. Had to move the other service off of it but it now works.