It's kind of random, but I suspect you are right.
Looking at the last 3 drafts, the top OC's went off the board like this:
2018: Rd1 #20, Rd1 #21, Rd2 #39, Rd3 #97
2019: Rd1 #18, Rd2 #44, Rd2 #48
2020: Rd1 #24, Rd3 #78, Rd3 #83
I don't know team needs, but based on this I'd assume at least one team will spend a first round choice on an OC. And just to make it interesting, the #1 spent in 2020 and the 2/#48 in 2019 were both by the Saints.
