I have an Xcover 4S, not the pro. Though I don't use it anymore. We also have a ton of those at work. The Xcover 5 (also non-pro) too.
It's an ok phone for the 120 euro I paid for that, I bought mine second hand for hiking. They get really long support from Samsung because they view them as an enterprise product (whether it's the enterprise edition labeled one or not!)
However, they are SLOW. The screens are kinda crap LCDs, even in direct sunlight a good OLED screen is much better. I don't know why Samsung sticks with LCDs on these. If they'd have used transflective LCD like most outdoor GPS devices I could see the point for outdoor readability but they don't, they're just cheap crap LCDs worse than what they put in their $200 budget series. OLED is better than they crap they put in these phones in every way. In the past Samsung mentioned they did this because OLED screens cracked more easily, however this cannot be a thing anymore since most OLEDs now use flexible plastic substrate, even in non-foldable phones.
The XCover Pro 6 uses the 778G chip though which is the same as I have in my Galaxy A52s and it's ok. Be aware, Samsung usually pairs this chip with very slow UFS2 flash (Snapdragon 8 models come with UFS3.1) so installing apps is tedious. But during normal use it's ok.
It's kinda cool that this phone has DeX but with only 6GB RAM and a midrange processor with slow flash I wouldn't expect too much of it.
They make you pay an extra feature license to use the side "push to talk" button with apps like MS Teams by the way so be aware of that. I'm a HAM operator so I'd like to use that but it's less interesting this way. It also stops people from building the PTT functionality in apps because nobody has the license anyway.
But I haven't seen the new Pro 6 yet no. It looks ok but yeah the prices are HIGH. And battery availability is tough, I've had a hard time finding an official battery for my 4S. Samsung doesn't sell them directly and a lot of the batteries on Amazon are fakes. Meaning the NFC stops working as this is part of the battery (Samsung WHY???), and you have questionable safety. This kind of undermines the idea of a replaceable battery, if you can't buy genuine batteries easily. Sure, it's a bit old by now, but this is exactly the time when you'd need a new battery.
But really, for 300 euro you can get a Galaxy A52s which is roughly the same phone in terms of specs. Exact same processor and ram. No replaceable battery but half the price, with a much better OLED screen with in-screen fingerprint. Put a tough case on it (I use the Spigen Tough Armor on mine, 15,99 euro on Amazon) and a good screen protector and it's just as indestructible as the XCover Pro IMO. And even if you break it and have to buy a totally new one you still spent only the same as an XCover Pro 6. The A52s still even has a 3,5mm jack like the XP6. The A53 doesn't and it has a slower exynos CPU so I'd recommend the A52s instead.
Also, don't overestimate the ruggedness of these devices. They're 'business rugged' at best. Even with the XCover 4S I used a Tough Armor case on top of it.