Back to OP's original question.
- Can you tell us your budget?
- What is your plan for your gravel build? % riding on asphalt, % gravel roads? % trails/singletracks?
4 years ago, I purchased a Seraph Carbon Gravel frame. It has served me well. No problems at all with this build. (90+% Aliexpress parts.)
On this bike, I am only able to put 700C X 40s on it. It makes a great road/gravel road bike, but I found out that on long gravel downhills with lots of washout, washboard, and chunky stuff, I have to ride the bike so slow, otherwise it beats me up.
Last year, I built up a 29er carbon hardtail with a front suspension fork and dropper post, larger low rolling resistance 2.0 tires, "H" style ZTTO carbon drop bars. This bike weighs a bit less than my gravel bike.
Now I have two gravel bikes. I discovered this year that I end up riding the 29er hardtail a lot more than my gravel bike, because it is just so much more capable of a bike. When I know I will be riding a ride that has a lot of pavement, I will swap out the tires to narrower low rolling resistance tires. The 29er is just about as fast fast my Gravel bike.
The main difference between the 2 bikes is that my gravel bike is 2X11 and my 29er 1X12. The gravel bike has closer spacing between gears. This becomes very important if you are gravel grinding in a pack. On my 1X12 29er, I have been dropped because I shift down one gear on a climb and I find I need a gear in between what I have in the 12 speed cassette. I loose too much momentum and speed in the lower gear and the pack rolls away from me. If I stay in the higher gear, my rpm is too low and my legs get loaded up.