I think the English media is misreporting this. He’s been remanded to jail pending trial as a potential flight risk, but he can leave jail by posting a bond / bail.

I think Swiss media just reports it differently because it’s more common to be let go with a promise to reappear for your trial and no bail, so they report this as his being remanded as a flight risk, whereby in American and Britain the default is typically being released on bail, so reporting that they were remanded implies that bail was denied.

In English language news this is more commonly headlined as “judge sets bail for Swiss bar owner”.