Well pantsuits are within the scope of cis women's wear. Depending on your body, maybe you could have an existing suit tailored to fit a little different. Get a more comfortable shirt to wear with it. Or find a more androgynous suit. Lesbianish.

And there's always accessories, scents etc.

To consider: The more tweaks you make the more likely you are to be interpreted as gay. How bothersome would that be?

Maybe you could do something a little more femme with your hair? I’ve boy-moded a wedding with a bun and some face framing tendrils (why the fuck are they called that?) and that was pretty cute. It got me by.

There are nice outfits that can be femme depending on how preceptive someone is but that still tick the boxes for traditional male clothing in a pinch. Black slacks and a nice white blouse, for example. You can make the blouse on the femme side and avoid too much unwanted attention while still dressing literally femme. Light fabric, sleeveless or fun sleeves. If you bring a light jacket or blazer you can use it to go stealthy wherever you want, too. It also makes it easy to bring options so you don't feel stuck if you change your mind one way or the other. Multiple shirts.