Considering the main ingredients are sodium and sulfur, recycling should not be a major problem. Those are commonly used elements and not particularly toxic.

This question is always asked about EV batteries. Their recycling is something that is being developed but is still in prototype phase. Actual production scale recycling is not feasible yet because the number of retired EV batteries is too small to be efficiently recycled. That will eventually change but since EV batteries are generally lasting for a decade or more, it will take several years before we start seeing significant numbers needing to be recycled. I would expect that the same story would apply to these batteries if they are deployed.

"recycling should not be a major problem", well, this is where more details would be more than welcome.

Since they are still developing this as tech, I am not surprised if they are not really discussing how to recycle it.

Recycling would depend on how much of this ends up getting built, how much value there is in the components, and whether there is a cost/risk of not recycling. If only a small number are ever built, then recycling isn't much of a concern.

There doesn't seem to be anything in here that is radically different than other batteries and the components are less toxic than many.