Apple answers how many AirTags can you use at a time with a single Apple ID if you are looking to pair some with your iPhone.
How many AIRTAGS can you ADD to Apple's FIND MY?
If you forgot your Apple ID password - Apple Support
Find your keys, backpack, and more with AirTag and Find My - Apple Support
Apple Announces AirTag Updates to Address Unwanted Tracking - MacRumors
Apple AirTags: Everything You Need to Know
Apple AirTags Range, Battery Life and More, Explained
Get an Apple ID for your child - Apple Support
Use a different Apple ID to share purchases with Family Sharing - Apple Support
Can Airtags Be Connected To Multiple Phones?