Plectranthus was my guess. I have a Plectranthus that I eat sometimes. It really should be outside though, it loves the sun. I don't know if yours is edible. I don't recommend trying for yourself lol.

Check sedum 'Angelina' or 'Lemon Ball'

Nice Ech whatever kind it may be, but it needs faster draining mix; what you have looks very water retentive. I'd add 50% perlite or pumice, anything like that you can find.

It probably wants more sun; if you look at the photo of it on net, it is more compact - almost no bare stem space between the leaves. I am sure you give it best light available, but indoor light is usually not strong enough, it looses some intensity coming thru the glass, and drops considerably moving even slightly away from the window. If you can put it outside, it will start growing more compact, and when ready - bloom. If you do so, acclimatize it to outdoors light to prevent burning. You didn't say where you live, but it will overwinter outside if at least z8 or higher.