I assume you can achieve this with a third-party service to automatically generate QR codes for each ticket sold. Airtable doesn’t have built-in QR code generation, but you can achieve this through Zapier, Make.
You need to create a scenario that triggers when a new ticket is added to your Airtable base.
Then the automation will work and the QR code will be generated for the sold ticket.
I do it in Airtable, using an extension + script, if you need more info, just let me know it…what I do it is to “each time I create a client or lead” it is generated a Qr with the client´s info…