Tesla Wall Charger will not connec to XER10

Just upgraded to XER10 and now Tesla Wall charger will not connect.  This is what Tesla told me:

• 2.4 GHz Wi-Fi (no 5.0 or 6.0 GHz shared networks)
• WPA2 security (no WPA2/3 shared networks)
• No MAC address filtering
• No content filtering

Xfinity says they cannot dedicate another SSID with only 2.4. Now what?  I was better off with the old system.  Now that they drilled a hole in my wall. Any suggestions.