Unfortunately this is an extremely difficult area right now. There were only a handful of nationwide insurance companies willing to rate liability insurance on STR management, and almost none (none?) will do it anymore.
Definitely be careful, as most nationwide brokers will incorrectly rate you for traditional property management insurance, which almost always applies to LTRs and specifically excludes STRs in the fine print. I would say 9 out of every 10 I talked to didn't realize this and were happy to sign me up for a policy that wouldn't cover what I very explicitly described to them. The other 1 out of 10 understood, told me there were no options, and then went on a rant about how most insurance brokers don't really know what they're doing and just care about making the sale.
In most cases you have to find a small local company/agent for this kind of coverage. But in many cases they will just ending up routing you back through a broker which brings you back to the above scenario, so you've really gotta pick and choose well.
Keep in mind that if you do find one, there will be things you need to do on your end such as specific signage, obtaining certificate of insurance from any vendors you work with (cleaners, handyman, pool guy), etc.
Safely I believe also includes liability as an option in addition to their usual damage protection at an extra cost, though in that case you're paying on a per booking basis rather than a yearly fee, and it's likely going to be quite a bit more expensive. The advantage to this is you don't have to worry about your vendors keeping up with their licensing/insurance as much as Safely doesn't care about that.