Multivendor?

No, unfortunately not as yet.

I see that wclovers.com has a page with instructions for how to integrate arbitrary gateways here: https://wclovers.com/knowledgebase/wcfm-marketplace-custom-payment-gateway-developers-guide/

So it should be possible to add support by creating a small plugin per gateway if you have an installation in which to test it.

Thanks for the quick reply
I have an installation that can be used for testing ?? but this is beyond my capabilities

You may try to contact the wclovers.com vendor. We will of course help with any information they would need implement this.