Being an OL drafted in the top 10 is difficult enough. There have been a total of 16 OL taken top 10 in the last 10 NFL drafts.
Being an OL drafted in the top 10 that plays RT exclusively is even more rare. Of those 16 top 10 picks, only 3 didn't have at least a full season's worth of games at LT (Jedrick Willis, JC Latham, and Armand Membou). That's 3 guys... in the last 10 drafts.
It could happen, and I would never bet against a driven, productive, physical freak like Cici, but the odds are very much against it happening.
I get the point you're making but more broadly you're talking about RT value vs LT value and how that relates to draft ceiling. However I think that more so is heavily weighted by the fact that top ots are usually just placed at LT so obviously there should be more top LTs drafted than top RTs. However, why shouldn't Joe Alt and Penei Sewell be included in this list given they were specifically drafted to be RT by the team drafting them? Sure they played LT in college and showed they could do that, but ultimately if the argument is the league doesn't value RTs as much as LT when it comes to drafting top 10 or 15, the fact that they took them with the specific gameplan of playing them at RT kinda makes that aspect irrelevant, doesn't it? Unless the only point is that they have to have shown ability to play LT? Which I'd just ask... why? Because ultimately a team that is drafting a Tackle is likely taking them based on the hole in their roster. So sure a team is likely to take off some points for a guy who has only played RT when they need a LT, but if they need a RT regardless, having played LT is irrelevant...
Like I'd personally use top 15 because if he's a top 15 pick I'm going to say that's still a big win, and I'd count guys who played RT in NFL Day1:
2025 - 1 out of 3 - Membou like you said was a RT in College. Banks is interesting cause he played LT in college while the Saints 1st last year Fuaga played RT, But Fuaga played LT for Saints last year so it's not out of realm that Banks moves to RT. But either way they were both top 15 picks, so ONE is getting counted here. To be simple we'll go with Fuaga.
2024 - 3 out of 4 - Joe Alt played LT for ND, but immediately was drafted with intention of playing RT and thats where he's started Day1. JC Latham played RT in college. Switched to LT in NFL, BUT is about to move back to RT this year. Again Fuaga was a RT in College and likely is again now - exact same situation as Latham basically.
2023 - 1 out of 3 - Darnell Wright had experience at LT in College but Played RT the year he was drafted AND Immediately started at RT for Bears.
2022 - 1 out of 4 - Evan Neal in college played LG as Frosh, RT as So, and LT as JR. But again immediate starter at RT for Giants, but is now moving to guard I believe.
2021 - 1 out of 1 - Penei Sewell day1 Lions RT.
2020 - 2 out of 4 - Jedrick Wills obviously played RT as you mentioned. Tristan Wirfs was basically exclusively a RT in college and immediately was the RT for Buccs. Now moved to LT starting Last year.
So out of last 6 years there have been 19 OTs drated top 15. 9 have exclusively played RT in College or were drafted with the Purpose of Immediately playing RT in the NFL, which is 47%... If we exclusively looked only at top 10 it'd be 7/13 = 54% (Just to show I wasn't making it top 15 to make my numbers look good!)