I think now it's fair to say rots kenobi surpassed sod maul force wise
Maul's domination with tcw kenobi doesn't really apply to rots kenobi.
A. Kenobi has "grown much" just over the course of a few months during the clone wars(stealth) and post his last encounter with maul he had all of season 5, season 6, dark desciple, and 6 additional mnths of heightened conflict in the outer rim seiges to grow.
B. More importantly, we know that force users grew from confrontation and Kenobi had numerous confrontations he triumphed over including
A. Adi Galia's death, which kenobi got over by focusing himself
B. Maul killing his love in satine
C. The conflicts he dealt with in obsession
D. And off course the largest confrontation has to be his fight vs anakin where he let go of his biggest attachment to anakin. Given how massive that was, its fair to assume he'd gain massive growth from triumphing there.
The cherry on top is that Maul's showings have all been with circumstances nd that he has only dominated kenobi without some favorable aid at play which is pretty sus when you consider that maul most definitely has an inclination to choke kenobi given he was dreaming about it in death sentence("I need my hands around your neck"
and yet he's never done it when there's nothing aiding him(and logially he could have done it any time during their 1 v 1 on florrum or in son of dathomir if maul was really capable).
ROTS Kenobi isn't tied to Sod Maul force wise.
And when we compare rots kenobi's showings to maul's, kenobi's are simply better. His megalith feat is well above anything maul has managed. Even 5 months out from rots he was stalemating post tcw anakin who was vastly above being able to manipulate jedi starfighter dwarfing dreadnaughts and being able to blast tanks.