@Mark--TP Check this forum topic and see if you can manually upgrade your XE75 Pro with firmware provided there: https://community.tp-link.com/en/home/forum/topic/617382 The problem description is...

@Jokker Your new ISP router is most likely WiFi6 capable, that would explain speeds you are getting. Deco M9 Plus is WiFi5, it will be slower. I have M9 Plus and M5 Deco mesh, the best speed test...

@KenjiBailly Still not as good as one would expect from WiFi6 and gigabit Internet, but perhaps there is a lot of WiFi interference where you live. What is associated link speed on device you are...

@KenjiBailly On Satellite Decos you won't be getting speeds faster than on Main Deco. For that reason, if you'd like to troubleshoot slow speeds we should start with Main Deco. Here is what I would...

@Sheepie Deco XE75 mesh will operate in Access Point mode just fine.

@Yohome I used that on my M5s, and it worked. I don't have X60s to test with. If nobody suggests anything else and you are somewhat desperate, you may be able force new firmware on X60s through...