My Lightroom is “light”. Free and some features grayed out. So I’m going with Affinity. The problem is on my side. The presets were RGB. I’m given options, see the screenshots. Lab16? See the formats, presets and profiles. There are others, could not capture in one shot.
The first image is the Raw file edit screen. We do all edits with the panels on the right, when done, hit “develop”. Have the option to convert document. I selected Lab16 and it created a profile as an example in screen shot. Get something I like, develop, choose format, pixel format and profile.
Edit: I’ll continue to experiment with formats other than RGB and post my results. Thank you for your help and any more suggestions welcomed.