Thanks. Based on my direct contact with Express VPN support, they have explicitly stated that no Wi-Fi 6E and/or mesh routers are supported. However, it’s worth noting that FlashRouters offers the option to flash routers, including the one mentioned as your example that I used as an example myself in my communication with them, which Express VPN support claims is not supported.
Express VPN support provided the following explanation for suggesting the routers they previously recommended:
"The reason why we are suggesting the routers that we provided to you earlier, especially since your concern is about a Wi-Fi 6E Mesh router, is that we still have a limited number of routers that are capable of installing ExpressVPN on their firmware.
Also, we have a list of routers that you can purchase from FlashRouters that have the ExpressVPN firmware already installed on this link. - https://www.express-vpn-links.com/router-setup/buy-router
However, the router that you saw, which is the Asus ROG Rapture GT-AXE16000 router, from FlashRouters is not included on this list. In case you plan to purchase this router that states that the ExpressVPN firmware is already installed on that router, we cannot guarantee that it will work properly as ExpressVPN’s firmware isn’t compatible with that router model.
Rest assured though that on our ExpressVPN for routers, the ExpressVPN firmware will work properly on these as they are already proven and tested."
Since the acquisition of Express VPN by a rebranded company previously known for focusing on malware, there seems to be a noticeable shift away from customer centricity and developing products that aim to satisfy customers. This raises concerns not only from a security/privacy standpoint (which is a significant reason why people choose their product) but also in terms of their approach to product management.
The fact that their support is unable to provide guidance on specifications and standards to consider in newer router models, or at least offer a list of supported models, suggests a lack of continuous improvement and knowledge in router technology, which is essential to their business, particularly their router product offerings.
It’s becoming ridiculous to even attempt addressing inconsistencies in their repeated responses. I’m giving up - maybe other VPNs are the alterantive I should look for.