Sorry for being a bit late with my response:
A lot of things have changed with the recent version(s) of Resolve mostly good and some not-so-good. I don't know if you are using the Studio version as I do, so some of the things I set may not be available in the free version.
Aside from re-processing some older footage (mostly
M2P DlogM) with new settings I have not processed any new footage like that. With my
A2S I shoot HLG exclusively.
Here are the most recent settings I've used to process DlogM 4K-10bit footage into HDR10 using Davinci Resolve Studio 18.1.2 (latest beta as of this post):
Step 1 is to correct the Dlog gamma into regular Rec709 by selecting an appropriate (your preference) LUT and set it to the "Input LUT" slot.
Step 2 is to select custom with separate gamma and colorspace settings: Choose Rec709 with Rec2100 HLG. That is the best input starting point leading Resolve to map it into the Davinci Wide Gamut - Davinci Intermediate TIMELINE.
All the grading happens here using the HDR color wheels and the Parade (set reference levels and extents). Adjust your peaks to 1000 nit (in combination with the rest of the adjustments). Since your input media is still mapped into SDR you do have to use the HDR grading wheels to expand the footage into 1000 nits:
Use the rest of the HDR grading to lift "light", "highlights" and "specular". I found the contrast of the input LUT to be a bit excessive so be picky with the choice. But you can use "Dark" and "Shadow" to lift and expand the shadow details.
There are different ways to do "massage" the footage. You can use the SDR tools to "lift" the footage (using offset). Sometimes that will produce better results it all depends on preferences.
Your production output step is the same for all HDR processing modes. If your input material is HLG for example, I remove the input LUT (of course!) and change the input color space from 709 to Davinci Wide Gamut. combined with Rec2100 HLG (Scene) gamma. This, along with keeping the working and output luminance at 1000 nit. I output this timeline like the previously discussed material in Rec2020 - ST2084-1000nit.
Make sure in all cases to check "Use color space aware grading tools"