Applying Slapback Effect

I see a few posts about removing unwanted slapback but what is the best way (or plug in) for adding slapback effects … specifically to vocals?

There are Delay and Echo Effects. I haven’t used either one but Delay is probably the one to use. And you might want to figure-out the tempo and delay 1, 2, or 4 beats, etc.

Valhalla supermassive is the the most versatile free echo-verb plugin I’ve seen.