Progesterone levels at transfer?

Hi ladies, what were your progesterone levels at frozen transfer? Or what does your clinic like the levels to be at?

I had my progesterone levels measured on ERA day and they've come back they're adding additional subQ progesterone injections (my clinic doesn't do IM) so it's obviously low, but I don't know what the ideal would be? The units of mine seem to be different to what I can see online, so please include your units as I may need to convert! ☺️