I think it is category specific. I set up a dummy listing in my preferred category (books). The quantity option didnt show. I went back a few steps and changed the category to kids clothing, and the quantity option shows. I changed the category back to books and it disappears.

I haven’t included a Start &/or Reserve Price. I have entered the Buy Now price but the quantity option is not visible. What do we try next?

I cleared the browser cache and cookies. No difference. I ran a dummy listing (car stereo) and the listing process takes you through different screens, and it offered me the MQL option. So what now? :)

Thanks for that response. The quantity option is not appearing on my screen under "More options", whether I use Chrome or Edge. Weird!