GS724tpv2 and Google wifi

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Modem → Google Nest Wifi router or primary Wifi point→ Switch → Google Wifi point(s)

1. Modem’s LAN port connects to Google Nest Wifi router or primary Wifi point’s WAN port 
    via wired Ethernet
2. Primary Wifi point’s LAN port connects to switch’s WAN or uplink port via wired Ethernet
3. Switch’s LAN port(s) connects to any Google Wifi point's WAN port via wired Ethernet

Switches and Google Wifi points may be connected in any order (as long as they're downstream of the Google Nest Wifi router or primary Wifi point) and you may connect several of these devices via wired Ethernet. Connecting downstream is important as it allows the Google Nest Wifi router or primary Wifi point to manage the downstream Wifi points over the wired Ethernet.

(✓) Modem → Google Nest Wifi router or primary Wifi point → Switch → Google Nest Wifi router or Google Wifi point

                                                                                                                             → Google Nest Wifi router or Google Wifi point

(✓) Modem → Google Nest Wifi router or primary Wifi point → Google Wifi point → Switch → Google Wifi point

                                                                                                                                                                  → Google Wifi point
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Assuming the underlined set-up is yours, Challenge Google WiFi support.

If the Google WiFi see each other, a loop is predictable - unless they do the right thing on the Google WiFi devices. Nothing wrong woth the switch in my opinion. Some vendors claim there must be non-managed switches without any STP (and higher) and without proprietary loop prevention. To add more confusion - because STP is switch-wide - one can't use a dedicated VLAN for the wired backhaul of such Mesh systems.