How do you do HA for network switches?

We're building a small cluster of VM servers (Proxmox KVM cluster).

On the switch side, we're using Arista DCS-7050SX-64 to connect all the servers, via 10Gbase-LR.

If the switch goes down, or we need to reboot it, that takes out all our network connectivity.

My question - what are some ways we can do HA at the switch level here?

I'm reading up about stacking and MLAG at the moment, and trying to understand how it'd be used.

So you can join N switches, and they appear as a single switch, right?

Can you use it for HA?

How does that work in terms of connections to servers?

We're using LACP at the moment for some servers, for more bandwidth - but would you span LACP across two stacked switches?