This form of insurance is exceeding expensive and exceedingly rare. Large buildings self-insure (by having a ton of doors) and small landlords don't want to pay it.

Depends on the country I guess, but in France it's about 3% of the rent.

For that price they will pay you the rent if the tenant is not paying, and take care of the getting paid by the tenant.

If landlords don't want to pay that, then they accept the risk of having to deal with a tenant who doesn't pay.

It might be more common in Europe, I've never seen it in the US (but maybe some property managers offer that as part of their 5-10% cut of the rent).