Sorry for the delayed response. I am afraid Adobe Illustrator and other Adobe software like Photoshop and InDesign do not have a built-in "auto-fill number" feature similar to what spreadsheet software like Microsoft Excel or Google Sheets offers.
I would suggest you post this on our UserVoice page (https://illustrator.uservoice.com/), submit a feature request for fill number options, and share it here as well after posting on UserVoice. If your idea gains support from the community & UserVoice, it may get the attention of the Illustartor product & development team.
Remember that software capabilities evolve over time, and the product team may introduce auto-fill number features in future updates of Illustrator based on user feedback and demands.
If you ever encounter any more questions or problems in the future, don't hesitate to reach out. I'm here to assist you.