It’s not a uniquely US situation. Rent is a huge issue for the whole sector globally. I’ve sent a questionnaire to bar owners in nine (I think) countries, not including yours. In most of them, it’s down to the bar owners to try and reach an agreement with their landlord. Of the countries I surveyed so far, only Norway, where the State covers 90% of a bar’s fixed costs, and Singapore, where the government is paying some money (not clear how much) to landlords who are then supposed to reduced rent by the same amount, have any sort of rent policy. There’s an ongoing campaign in the UK, led by Jonathan Downey, to ask government to provide some rent relief.
I honestly think few countries will move, as the costs would be staggering. It may depend on how the commercial property market is structured: it should be easier politically (except, I guess, in the fucked up world of the US) to impose rent freeze / cuts without compensation to large landlords or developers (public sentiment is against them) than it is to nudge more modest landlords.