Is this down to a mobile-only subscription issue? Not tried this with Disney+ as I have it on my Firestick anyway but another service I had a mobile subscription for wouldn’t allow me to mirror to another monitor, I assume to force you to pay for the full subscription.
Seen teams win the Champions League with some very favourable runs to the final. In theory it should be the most prestigious and difficult but with a decent draw and some luck in the final it’s no guarantee that you’re beating the best to win it, and teams have won it when they haven’t even been the best team in their country for several years.
The Premier League for me is more of a challenge not just because of the quality (and I think quality in all it’s tiers is above the tiers in comparable leagues) but also because you have to face every team home and away and do it over 38 games.