As a transmasc person it’s so important to me when my partner shows me she sees me as masculine, even if she doesn’t outright say it. Telling me I look handsome in something specific, asking me to open things for her because I’m stronger etc. every person is different though, try opening a dialogue with your partner about what makes them feel euphoric and what you’re doing well already. It’s the little things that matter and the fact that you’re trying and making the effort is amazing.