Mesh networking DHCP relay problem on Xiaomi AIoT Router AX3600

I did buy the two pair of Ubiquiti UniFi 6 Pro Access Points (U6-Pro Wi-Fi 6) and trying to get them from the Customs, but I do need switches for the second floor, with 2.5GbE+ ethernet access.
Would you recommend Omada managed TP-Link devices, actually two pairs of TL-SG3210XHP-M2, to have at least 16 ports?
I can easily get unmanaged TP-Link switches (like TL-SG108-M2 and TL-SG108PE for POE+ ports), as they are widely available in my country.
I asked partly here (Switch(es) recommendation for 12 (preferably 2.5Gbe) Gigabit Copper RJ45 ports and 2 POE ports (minimum) requirement), but generally Cisco switches are out of my scope.
Additional question: Do Ubiquiti UniFi 6 Pros require any additional hardware on this setup?
Thanks.