My ISP is just a UK provider which uses the openreach network - FTTP. DHCP for the connection
The switches I got from AliExpress typically they are unbranded as such but they are managed 2.5gbe and SFP+ work great and a fraction of the price compared to UK market places. There's loads on there, all pretty much rebadged so I just grabbed the cheapest at the time mainly. I believe they are horaco and poeplus brands (from the gui, the units themselves are just plain)
Just make sure you select the correct ones from the selection boxes / little tooltip over the product photo so you get the managed ones.
You could in theory use a dumb PoE switch as most allow you to pass the VLAN but a managed switch is much better and not much more expense. I bought 2x 2.5gbe switches. One is non PoE and the other is PoE I was looking at a 8 port PoE switch but they only seem to have 1 SFP+ (10gbe) Ideally you are best trying to find 2x SFP+ on both switches then you can use one port as the uplink to each switch so there's no bottleneck and also you could then add a 10gbe NAS and a dedicated PC with a 10gbe pcie card for example, my “PC” actually resides on my NAS anyway as it's a virtual machine so technically I don't need to transfer files via LAN as the drives are local on the machine. I may just get a 5 port SFP+ switch to sit in the middle so I can have a 10gbe network but I don't really need it. Cheaper and less power than 10gbe RJ45
I am hoping in the future that glinet make a little eco system, a bit like unifi and omada (switch, access point etc managed / adopted together). They seem to have released AstroMesh which might be the answer but I'm unsure. @bruce is AstroMesh the answer to a unified product where we can adopt / deploy like unifi, omada, grandstream etc. I know there's no switches on offer yet.