this can be done easily

1. attach a lockbox (old fashion) holding the key to your front door or railing; 

https://www.amazon.com/Master-Lock-5400D-Combination-Portable/dp/B0002YP1VC/ref=sr_1_6?crid=OJQ8C6CBPV35&keywords=lockbox&qid=1677814084&sprefix=lockbox%2Caps%2C498&sr=8-6

2. phone screen tenants first to filter out the disqualified ;

3. ask for a photo id to send to you; give them the lockbox code when they get there or 10/20 minutes before their showing schedule