Link Aggregation only helps if you are 1) looking for redundancy 2) are transfer multiple individual streams of data. Packets of data aren’t split, instead they are sent to one port or the other based on algorithm.

In my configuration with ATT Fiber, I have a Ubiquiti UDM-SE that goes to a Unifi Aggregation Pro. The the Agg Pro then has various runs, one which is a Unifi Flex XG in my office (has 4 10Gbe ports). You can technically skip the Agg Pro and just use the Flex XG in your office.

I was in the middle of that storm and yes ATT worked once they repaired the fiber, but Xfinity was mostly out for much longer. They even put their generators in our neighborhood to power their amplifiers.