Edit: I have no experience with this seller, but here are the links:
Internal routing through headset: https://www.alibaba.com/product-detail/2023-Lightest-Weight-650g-same-to_1600860750115.html?spm=a2700.shop_plgr.41413.3.39582af1cVmqH2
Internal routing through downtube: https://www.alibaba.com/product-detail/2023-Lightest-Weight-690g-same-to_1600861204788.html?spm=a2700.shop_plgr.41413.7.39582af1cVmqH2
Really interesting frames as well.
I tried to do some digging on them. What I noticed is that the seller also offers an Epic Evo fullsuspension copy. Two friends of mine also got really lightweight Epic fullsuspension frames through "allstarbicycle.com" where a couple of guys I know had purchased SL7 and Epic hardtail copies with no problems at all for a few years now.
The Epic FS geo cad table illustration, some pictures and the font on allstarbicycle.com are exactly the same as for the Epic frame from the seller you linked.
Now unfortunately the Epic fullsuspension frames which my friends probably bought from the same seller/factory unfortunately cracked at the BB and chainstay after very few rides. While they are receiving replacements and people have been happy with other frames from that website, I guess I would be careful about the super lightweight stuff from them.
Some pictures of the failures and comparison screenshots of the alibaba seller/allstarbicycle.com attached.