Is there maybe a way to test a friend

[last ice]

Im like 80% sure I'm Trans bc I thought that for a pretty long time and I just wanted to ask for ways to kinda test a friend of mine to just be more with their opinion on Trans ppl without them finding out that I'm Trans
I kinda drop a little bit of hints like commonly "joking" around like not needing to pretend I'm a guy or dressing as masculine as I can etc they sometimes jokingly call me a femboy which makes 0 sense but I guess better than a cis girl. They're also bi so that might mean they're more likely to not be transphobic I guess, also when I came out to them as also bi they said it ain't anythin to be ashamed of or sth like Dat.
Anyone got any ideas ? I really appreciate anything that might help :]

[quiet summit]

since theyre bi and accepted you, they'll probably also support you being trans
lgb-without-t people are not common

and if theyre neutral about it theyll probably be pretty understanding and open to learn

or alternatively start a discussion about politics
take some recent news that interests or worries you
try to steer following political discussion into discussion about lgbtq
theyll tell you their stance then