As someone whose only previous knowledge of ivermectin was from being given it to treat a parasite infection acquired in the backwaters of southeast asia a deca

As someone whose only previous knowledge of ivermectin was from being given it to treat a parasite infection acquired in the backwaters of southeast asia a decade ago, I've been confused to see it keep coming up in the context of COVID. I thought it was just some weird Internet fad from the pandemic, but then here's a Lancet article about a trial evaluating the use of it for "long COVID". What is the proposed mechanism of action?