I think that this year, Pogacar needed to race the UAE Tour in order to put the rainbow jersey on show. It could have even been an arrangement with Pogacar and the Slovenian cycling federation: UAE offers you full support in the WC in Zurich (including staff, masseurs, team bus), but if you win the WC, Pogacar has to show it off in the UAE Tour. Especially since the team could not win for a few years in between without Pogacar.
Sure, he won in Rwanda as well, but he was already in UAE this year and they will not request it again, I think. They can also now win the UAE Tour with Almeida or Del Toro, and leave Pog to fry some bigger fish (as e.g. in 2024). Will Pogacar ever return to UAE Tour? I think he will, in a season he decides to skip the TdF - as a courtesy gift to the sheik for skipping the Tour. If he ever does that, of course. My bet is on 2028 if Tour is too close to the Olympics (which Pog will target).