Question about Feats with an ASI that don't go over a specific number.

Hello, I have a question that I've been wondering about for a little bit now and I can't seem to find an answer so I thought I'd ask. I have a few Feats I wanted to add for my players but all of them have an ability score increase that isn't supposed to go beyond a specific number.

Example. Your Constitution score increases by 2 and your Strength score increases by 1. An ability score cannot be increased beyond 16 in this way.

Of course there's more to what I'm making then just this, but this is the part I'm stuck on. If there is a way to do this on the homebrew creator how would one do it? Because I can't seem to figure it out.