I have 8 cameras , nas server etc that had port forwards working for both wan 1 and wan 2 , now not working

You don't provide many details but when this happened to me over wifi links removing IP-MAC binding from the devices solved the problem.

Don't think I have IP bindings for these devices , they have static address internally

I run 2 networks ( business and guest ) on lan port 1 and 2
Wan1 is default route for lan1 ( business ) with port forward for all cameras and nas server
However stopped working a few months ago , thought it was a bad wan issue but seems
Not as tried changing to wan2 still nothing