2.4 Ghz network printer won’t play nice with the blue curve router

I can’t be the first to encounter this issue and I’m hoping there is a viable, practical solution.

Our 2.4 Ghz printer does not want to connect to our devices since the upgrade to Fibre 300+ and blue curve router, is there  viable workaround or network adapter available?

Barring that, a decent quality printer available that will work with the router/network Etc  

Tia