Usually injectable E comes in 100mg/5 mL or 200mg/ 5 mL (100 is usually red and 200 is usually purple).
It really depends on what your prescribed dose is, and what your levels are, but it could be. I do .1 mL of 200mg/ 5ml, which is about 4mg of E/week, and my levels are right where they should be. Different people metabolize it differently, so the actual amount administered can vary quite a bit from person to person.
Some of the other comments have mentioned Joanna Harper, who is trying, but lacks enough data to make meaningful conclusions.
I recently did a presentation on the political side of this, and one thing to note was that with 1 or 2 exceptions, not a single state legislator could identify an instance of a trans woman dominating her field (because the anti trans movement is astroturf and designed to prey on people's fear).
If you would like my sources for the presentation, DM me. I only had a couple on this subject, but some of the auxiliary sources might help too.