So I was looking at the application for writers and the section for a portfolio. I only have one published fanfiction on ao3 and a few thread fics on twitter so am I excluded or can I still apply? Is that too little published items?
Yes, your threadfics count as writing material for your portfolio! Here are a couple of options:
In the "link" section for the portfolio, place the link to all of your threadfics in one place (the first "tweet" in a thread of your threadfics) for us to look through
Create a free carrd that links individually to each threadfic in one place using their buttons and labels!
As a last resort, you could also convert your threadfics into ao3 works and post them on the site and give us your ao3 link overall to look at.
Thank you for your question!