Hi there, @Christopher_Rosaschi and welcome to the Airtable community!
The only time the Link to Another Record field is missing is if you are in the Primary Field of a table. This is the first field (column, in spreadsheet terms) of any table created. You are limited with the configuration types within the primary field out of necessity, because this field quite literally represents the record (row in spreadsheets) name. It’s critical that this name is consistent as it represents the data from the rest of the fields in the record.
The good news is, you can use any other field in the record to link to another table.
Here’s a handy link on Primary Fields from the good folks at Airtable themselves.
