Wired Backhaul for WAX610 and WAX214 Access Points

The term mesh (in complete "Insight Instant Mesh WiFi network") is used only in the context of adding am additional AP where no cables can be installed - consult the fine Insight Managed WiFi 6 AX1800 Dual Band Access Point Models WAX610 and WAX610Y User Manual p.49 ff., chapter 5 "Install the Access Point in an Instant Mesh WiFi Network" - here the key points:

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What is an Insight Instant Mesh WiFi network?
A mesh WiFi network consists of at least one mesh-capable root access point and one
or more extender access points that connect to the root access point over WiFi (see
What are a root access point and an extender access point? on page 50). The root access
point is connected over Ethernet to a router or Internet gateway and provides Internet
access to its extender access points. The root access point and extender access points
work together to cover a potentially large area with WiFi network, which is the mesh
network.
A mesh network can be a good solution if you want to bring WiFi to the following
environments:
• Nearby rooms where cabling is not available (in line of sight and in range of the
current WiFi reception)
• Neighboring office buildings (in line of sight and in range of the current WiFi
reception)
• Any environment in which you cannot run cables

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We can argue if using the Mesh term in this context is smart or not ... it looks more like a marketing idea to me.

For the normal case with a wired switched network and the wired access points - like a bunch of WAX610 on a MS510TXPP (hard to get as there is a shortage in the delivery chain, I would suggest the MS510TXUP because of its availability and the possible Insight cloud management) everything as it lists - this alone is already much more than what most "Mesh" systems (plain 802.11k this is...!) are offering. Start your reading from the UM referred above, p.59 ff. "Manage the Basic WiFi Features" and then "Set up an open or secure WiFi network" and look where 802.11k, RRM, and 802.11v are mentioned.

So yes, of course you can!

In case you expect Fast/Seamless Roaming and the Instant Mesh WiFi as described above on your networks, at least the WAX6xx[Y] (and the WAX5xx) must be Insight managed.