Unless you can provide the name of the beach where people are not allowed in the water due to COVID then it is pure nonsense.
See, this is an example of where you simply don't understand logic.
If I cannot provide the name of the beach, it is not pure nonsense. You may not believe it based on the fact that I cannot provide the name of the beach, but that doesn't mean there can't be an alternative explanation. You do this a lot.
Perhaps the person posting doesn't reply to the question of where this occurred at?
Is it a possible fabrication? This is certainly possible if the person does not share the information. But it could also be that they do not see the question posed on Twitter.
But you don't get that, because your narrative is in jeopardy.