@Brianna216 , depending where you’re traveling. A number of countries in Europe require this information and your host is simply following their countries guidelines. Or it may be the host house rules as some of us (hosts) do require some sort of valid government ID. Either way, you have the choice to either comply or look for other lodging/accommodation.
Thank you everyone! I finally noticed there was a drop-down menu that listed ‘drivers license’ as an option. Not sure why they didn’t point that out when I asked for clarification why they needed passport info. Oh well, issue resolved. 😀