I use a Planck keyboard which weighs just under 300g with Kailh box switches and XDA keycaps. It's labeled as a 40% keyboard so I was reluctant at first, coming from 65% myself. But since the keys are smaller, especially the space bar, it still has a relatively high number of total keys given the small form factor (there's even space for arrow keys!) and having your layer switch keys right next to the space bar for your thumbs is very comfy IMO. I ended up liking it so much that I use it daily and now I'm wondering what to do with my main keeb. If you're up to trying something new, you can have a look at some layouts. The keyboard looks inconveniently small but once you see the layer layouts, you'll see it makes a lot of sense actually!

I use a Drevo Joyeuse for travel because it’s very low profile and wired/wireless

Drevo is out of business though :(

I'm using keychron k7, which I carry into the office. I've bought the keychron low profile optical mint switches, and lubed them. The keeb is very silent, small and the feel is okay. Coworkers don't even know that I drive a mechanical keyboard.

NuPhy Air 60 with Aloe switches should do the trick. NuPhy feels and sounds a lot better than Keychron in general, and Aloe switches are light linears that you'll barely hear.

I know I'm late to the party, but I've just ordered the new lofree flow, a low profile keeb.