Congrats, that is awesome!
This looks like a spiritual successor to the Niner MCR 9 with upgraded bottom bracket, udh, and storage.
I have had a 165x38 X-Fusion O2 Pro on an XC frame and it was really good but you'll probably need to use the lockout a lot. Hopefully they put some thought into what type of tune they suggest, the Niner X-Fusion shock has a short stroke and a custom tune.
Rockshox Rudy XPLR is pretty good but I would consider the Cane Creek Invert because it is cleaner looking and probably a little lighter. Couldn't tell by the specs or description if it is internal headset routing or if you care about the front brake cable, not much if anything on the market yet for internal routing until the DT Swiss gravel fork is available.
With the AXS mullet and the capability of a full suspension gravel bike, I still like a dropper. Reverb AXS XPLR because why not, the disappointing thing is that the longest drop available today is 75mm. Shame that they didn't go 30.9mm for more Reverb options. Ton of 27.2mm cabled options but every drop bar dropper lever sucks.
Similar taste in wheels as well, I have some aliexpress brand I can't remember 6-spoke carbon marble with Pirelli tires. I love it, but I do get some 80s BMX mags comments every now and then.
I'm sure you've seen similar setups in general internet searches but let me know if you want pics for comparison.
