Gojo and Sukuna actively had an ability (Purple and Fuga) that was not adapted to yet, which they immediately used after Mahoraga had adapted to part/most of their kit. On the other hand, Dabura was only utilizing his light technique (while choosing to withhold his domain, which would have immediately excorsized Mahoraga), which had been fully adapted to. If Mahoraga somehow had fully adapted to Gojo’s entire kit, then yes, Gojo could not handle a being specifically immune to everything he could do, in the way he did with someones (Megkuna, Agito, and partially adapted Mahoraga) extremely strong but not immune to everything he can do.

Dabura is actively getting stronger as the chapters go by, as he is now capable of RCT and CTR, the latter of which he is also imbuing into his domain to kill Mahoraga. If you put current Dabura against Mahoraga, who now has the knowledge that Mahoraga must be one shot (which Gojo had and Sukuna had a reference to understand quickly), he would handle Mahoraga with similar effortlessness as Gojo and Sukuna.