@Kristen451 It's allowed, but not recommended. There are none of the safeguards for a host on Airbnb that a landlord would want in place for a tenant.
In most jurisdictions a person gains tenant rights after a month. You will then have a nightmare trying to get them out if they stop paying the rent (Airbnb only guarantees the first month's payment) or prove objectionable.
Airbnb doesn't take a real security deposit from guests. And you have no guarantee Airbnb will cover any damages. They also do not properly vet guests.
If you want to rent long term, you should find another venue to advertise it on, and do as landlords have always done- take a real security deposit, ask for references, work history, current employment, full ID, interview prospective tenants, have a legal lease, etc.
And I'm confused by what you refer to as "unhosted home-sharing." Normally a home-share is a room in the host's home where the host also lives aand guests may share some common spaces, like the kitchen, with the host.
Are you talking about renting out multiple rooms to unrelated guests in a home you don't live in? Like a hostel-type situation?