How to connect optics (sfp +) to the router via a switch?

Question

network hardware

In general, there is an edgerouter pro, in which at the moment both sfp ports are occupied by two different providers, one of which needs to be replaced with a different third provider, but connected via sfp + since the corresponding speed is needed.
The question is, is it possible to connect a cable from a third provider (optics) to an L3 switch, and already connect a router from it, do I need a specific switch for this, and actually how to set it all up?

Answer 1

You buy a media converter from optics to copper, of this kind:

And plug it into the switch, the main thing is that the sfp module in it should be suitable for the one on the other end.

Answer 2

but connect via sfp + because you need the appropriate speed.

SFP + is up to 10 Gb / s - you hardly need such a speed
SFP - up to 1 Gb / s - quite enough for the provider
So put a regular media converter under spf and take it to gigabit copper