I had the startech one the siblings have mentioned but that wasn't very good and didn't do EDID emulation correctly. This CKL one [0] has been working really well, and supports USB 3 which is a nice bonus so I can share my webcam. Though sometimes after wake up my macbook forgets about my second monitor (I have an M1 connected to a cable matters thunderbolt dock), my windows machine which has direct DP connections doesn't have the same issue.

0: https://www.amazon.com/gp/product/B09STVW821/