An OML is an OML, is an OML ad infinitum.
It doesn't matter what it relates to. All are treated the same:
In essence, you won't be able to act as a single pilot for reward. In addition, you won't be able to fly with other people who have an OML in commercial ops. Also, you won't be able to fly with over 60's.
So, quite restrictive.
I have an OML, seeing as I had a rare cancer. This has been cured. But, I have an OML and the UK CAA won't remove it. Period.
Airlines can and do reject on the basis of OML's. It is a hassle for crewing to have to work around you, due to the reasons given above.
I have not been able to apply to easyJet because of it. I have been rejected in the Middle East because of it. Take your pick, it is just another means to filter applicants.
My advice; you won't get into big airlines with an OML (generally speaking, but not always). I'd aim for smaller airlines with a personal touch in HR, or the corporate aviation arena......