You need a switch that can handle LAGG but I don’t think you need a particularly expensive or fancy switch. I run a TP-Link jetstream switch that supports LACP and was only $110 (same price as a 8 port lite ubiquti switch). It has 8 port PoE+ AND 2 port SFP. You have to run a omada controller (similar to a unifi controller) but you can buy a box (OC200) or just run a Docker image which is what I do. I find tbe TP-link APs much better performing at a reasonable price too. Ubiquti with their no free shipping and price increases has gone completely out of hand since the pandemic. Made me switch out all their hardware because of it. Ubiquti hardware was simply not worth their price and OPNsense + omada had blown my Ubiquti setup out of the water.
Alternatively, you can pick up a used switch from Cisco, Dell, etc. that have excellent support for LAGG and other useful things for significantly less than the TP-Link (as long as you don't need 10G). I think the last 2960Gs I picked up were less than US$30/pc. Down side is 1) they use more power, 2) bigger switches (24- or 48-ports) are much louder, and 3) not going to see any new OS updates for most of them. So you have lots of options.
I shall check those out; thanks for the tip. I will say I checked and it looks like my elderly Dell switches have gotten an update in the 2020s, so perhaps it's just Cisco who said "nope...we're done with IOS 12".
