Usually after the combine. I still think for most non-injured players(Tua) the meetings and interviews with the prospects are more important for the teams especially at QB than anything they can show on a football field in non-competitive environment(pro days, drills at combine, etc.)
I mean, I can't defend their rankings since they are... you know theirs, not mine. One is here - @Four2itus ranked him in the top 5. I still haven't gone through his film so I don't know if I will agree with him or not. I think reasonable people can disagree on highly ranked players depending on what they value most and what they project will improve.
Examples(just going through The Draft Network's big boards):
-Solak has him no. 9: https://thedraftnetwork.com/articles/2020-nfl-draft-big-board-rankings-december-solak
-Sikkema has him no. 10 https://thedraftnetwork.com/articles/trevor-sikkema-s-2020-nfl-draft-big-boardposition-rankings
-Fanspeak has him no.5 https://fanspeak.com/ontheclock-nfl-mock-draft-simulator/preview.php?board_id=0
-Matt Miller has him no. 10 https://bleacherreport.com/articles/2868550-2020-nfl-draft-big-board-matt-millers-latest-rankings#slide1
-Drafttek has him no. 9 https://www.drafttek.com/2020-NFL-Draft-Big-Board/Top-NFL-Draft-Prospects-2020-Page-1.asp
and so on...
You can disagree, and I might too after I watch him, but it's not THAT outlandish for someone to have him ranked high. He's a talented player. Different people will have different opinions and that's OK.
About scheme fit... I actually think he fits in the LDE mold that Ballard likes(the Sheard types that might kick inside on passing downs). But this was more a thread about pure talent rather than needs and fit. At least that's how I understood the exercise.