Room clearing in urban combat is actually one of the most justifiable use cases for power armour in the medium term. Since that environment allows you to maximise the benefits of power armour (heavy, all round ballistics and fragmentation protection as well as raw strength) while minimising the downsides (endurance, questionable mobility over open unstable terrain, and susceptible to shape charge warheads).
Room clearing is one of the hardest, most difficult and costly elements of urban combat. Especially if there are civilians trapped in buildings with bad guys so you can’t just use heavy weapons to erase the room/building from afar.
Having power armoured, heavily reinforced armoured troopers be the spearheads for room clearing will save a lot of lives, since no one is going to be holding a room with an RPG.
Since you are doing room clearing, you control the initiative so can dictate the pace of combat operations, so can take regular breaks to change batteries. Since you are focusing on urban combat, you won’t be weight limited anywhere as much as if you want to design the armour with cross country capabilities in wet, muddy fields.
You don’t need to equip every soldier with such a heavy armour suit, just a couple point men from each squad would boost the overall urban combat capability of the whole squad massively.
The raw brute strength of power armour could also give troopers additional tools and options they would not normally have. Such as kicking down heavy, reinforced doors, clearing debris and even smashing through thinner walls all add tactical options to your team to potentially clear rooms quicker and safer.