I used to use a Panasonic GF1 for this purpose. They're cheap as chips second-hand now. 12 MP, micro four-thirds, just about pocketable with one of the range of pancake lenses (I used a 14mm or 20 mm Panasonic, there are zoom options now in very compact form).
I still have the camera, so why do I say I
used to use it for this purpose? It's not broken, it still takes lovely shots. So why hasn't it seen an outing in ages?
I found that it didn't offer enough of an advantage in image quality and versatility over an iPhone and a raw photo app.
However just-about pocketable it was, it was still one more thing to carry. I always have the phone with me anyway.
Maybe paired with a zoom it might have felt more worthwhile- but for out-and-about shots with a wide angle lens, the gains in dynamic range and shooting ergonomics etc. just weren't compelling enough for me.
If you've not found the burning need for one yet, I'm not sure you will find it that compelling either.
These days my walkabout option is a Sony A7Rii with 24-240mm superzoom for landscape stuff. Weather and weight permitting I can take other, superior lens options. But the all-in-one means no changing lenses and getting spindrift on the sensor in a blizzard. Stopped down to f/8 with IBIS and IS with care I can take acceptable shots for 24"x36" prints even without a tripod.
That was the the sweet spot for me.
Consider saving your money
or try out a superzoom if you usually travel with a sack of primes and need a lighter option. While the image quality is a perceptible step down from a killer prime on the same camera, it's still a hell of a step up from a phone.
Cheers, Hywel Phillips