As long we you are not changing the shower recess in anyway, ie the same tiles, the same area, the same place, the same everything.
If you wanted to change anything in this area it could be taken as a renovation. I am in a townhouse complex and we had a by law drawn up to make owners responsible for their shower recesses and bathrooms/internal plumbing as any problems with leaking pipes only affects their own internal space. That way, owners hopefully will not only maintain their bathrooms, so it doesn’t leak, but they can renovate and update their bathroom (without major plumbing changes which may need OC consideration). There was a perceived expectation in this complex that the OC would pay for repairs, and then put in better fixtures and fittings!
I also have a shower recess problem and am glad we have the above by law as I can change the tiles and do a “reno” on the bathroom without permission, only advising the OC of work to be carried out within the guidelines of the complex rules and regs.