Unless you need it why not go for a dumb unmanaged switch for half the price and double the spec? Cameras too.
i have seen the ubiquity stuff and yes it is great and all that but it is still work and it will be out of date in three years like everything.
For a router, i can't recommend pfsense enough. Does all I need and more. It easily replaces and combines a pihole and most iot devices also. They even got plenty of x86 multi port 2.5gb mini pcs on Amazon now. Dont need to go to Aliexpress now (which i never had an issue with by the way). Very well supported with hundreds of tutorials for anything you might want to do. It wont do wifi though so that can add cost. Also. if you want additional separate public wifi without access to your Lan you tend to need two access points. Benefit though if it covers what you need you can get and use anything as the router will take care of most of it. Even if the wifi only has router mode, you just plug it into the lan port rather than wan. Id recommend good still in support wifi though for basic security. I think its all been hacked other than wpa 3. Maybe not tp-link though but like our governments are saints!
So, i get the Ubiquity thing but its DIY for me. Not saying it is not good or not best for some but I wanted to reply and say something before you get overly invested in that platform.
PS: Ive used Asus Merlin a fair bit recently too. That is also very powerful and my secondary go to.
To recap on the switch, unless you really and honestly need VLAN, then why? It has never been required for me. Pretty sure too if someone wants to hack a camera or your LAN then getting physical access to you home would be the last thing to try! They will be more interested in stealing the TV unless your an A list celebrity with some significant dirty secrets! I am joking but I am wondering if a lot of real world opsec does not talk about common sense.