I don’t know about Fuji fans but I’ve had and been using daily the Peak Design V2 10l sling for about a week now and I have to say, I’m very impressed with it. I use it for a Nikon Z6 and it’s a great size for that with other bits. Lots of nice care and attention to detail.
I bought it as much as a daily bag for work as a camera bag and it’s filling that dual role really well. Even in daily work use, I can pop in the camera for discrete carry. The folding dividers make it very flexible in use and are far superior to the usual foam padded dividers in other makes.
I’m not sure I’d want to carry a 13” laptop in it as it seems a bit tight for that though I guess one might fit. I'd also note that this is a deceptively tall bag in that its deeper than it really looks. It comfortably also holds my 70-200mm f/4 lens with the FTZ adapter attached. That's 22cm or nearly 9" long. Quite a lot of smaller sling bags won't do that.
PD did a very good job on this bag.
If you’re not set on either bag, I’ll just add my 2 cents that the Billingham Hadley Pro is a great option too. I’ve had mine for about a month now, and it is quite versatile. The sizing is much closer to the PD 10L than the Rockaway. It fits my Canon EOS R with 3 lenses, and a 70-200 f/4 with adapter just fits vertically. It even holds my 13” MacBook Pro (snugly if with the camera) when needed.
I’m sure you’ll be happy with any of these bags, but I liked that the Hadley had less depth than the PD (so it looks less bulky) and looks more professional (I got the all black version) when I‘m in a more formal setting. Good luck deciding!