An unmanned switch? Nothing concrete.

A managed switch can give you telemetry, like port utilisation, and you can observe how much upstream is in use.

My concern is that you have a 1g switch connecting 2.5g capable devices to a 2.5g capable upstream network. That’s a bottleneck that I would want to eliminate. I know serve the home has a roundup of 2.5g switches that might be useful for you. I’m not saying you should switch to managed either, you may be well served by an unmanaged switch, and it will save you money. The telemetry for managed switches usually requires a system to collect and store it, usually an NMS, or network monitoring/management system.

Some manufacturers build NMS style telemetry into their products, ubiquiti does this to a limited extent. Other vendors may be better or have nothing at all. Something to think about when picking gear, if you like that sort of visibility. NMS usually operates over SNMP, which can become a whole thing; but for monitoring, setting up read only SNMP can be rather easy.

A word of caution. 10G and 2.5/5G were developed independently, and 10G came first. It was expensive which is why 2.5/5g Ethernet became a thing. Because of this checkered past, there’s a lot of 10G equipment that will not support operating at 2.5 or 5gbps. So if you get a 10G switch, check if there’s 2.5G, or 5G capability separately, or included on the 10G ports.

In my experience, most 10G ports are 1 or 10G, with nothing in between. Most 2.5G ports can’t do 10G. So the best idea would be to have a switch with a couple of 10G for fast uplinks and some 2.5G connections for your devices. Unless you can find a unicorn of a switch that supports all speeds on all ports, a switch split between 2.5G and 10G ports is probably your best bet.

Good luck.