(Macintosh; Intel Mac 0S X 19_15_7 on a iPad 10?!

There should be no such info on an iPad. For starters, no iPhone or iPad ever used an Intel CPU.

Where did you buy this iPad? Because it very much sounds like you have a fake.

Very, very weird. Seems to suggest the version of Safari in iPadOS was ported from the Mac, but not on the iPhone.

Did you see this in the context of Web browsing?

Maybe there's some Web site out there that isn't making a clear distinction between Mac Safari clients and iPad Safari clients, and it thinks that you have a Mac. I'd be curious to know how it came up with the "19_15_7."

It's yet another reason the User Agent string is effectively meaningless and should not be used.

The question doesn't make a lot of sense to me either, but querying Safari's User Agent will in fact report this iPad Pro is a Mac:

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Safari/605.1.15

An iPhone doesn't do that.

🤷🏻‍♂️

IPads typically have larger screens than iPhones. Maybe this is a way of encouraging Web sites to use layouts like those they use for Macs, instead of ones like those for phone screens?

Why does an iPad has the name (Macintosh; Intel Mac 0S X 19_15_7?

That's anyone's guess. To change the name of your iPad please read Change the name of your iPad - Apple Support.

Does it mean that it has the same feature or runs the same computer so is the iPad 10 a Macintosh?

No.

Ah, I think you're correct there, John. I assumed the OP meant that info was in Settings > About and the hardware had that description.