I’m in the UK and we had to be patient when Stripe first rolled out, even though it was developed by two fellow Europeans
Another solution would be to offer free apps, and then make your money on support plans using your payment processor of choice.
They can contact you via the dashboard, as is the case for all templates downloaded from the store.
You could also add your contact details to the app.
There was quite an interesting comment from @david earlier in this thread; I’ve emphasised the important bit…
People who copy templates usually do not know CSS, and have no idea about Google Scripts (they also usually don’t know how to use Glide, either)
The bottom line is: if you want to make money you will find a way to do so. E-commerce is a bit like water; you just need to find a way to make the money flow to you.