If getting back on the market increases the stock price all by itself, and it stays at a stable price (range) for a long-enough period of time, maybe then a R/S would be called for, to up-list to a higher exchange. But otherwise, I can't imagine an R/S doing anything but harming the share-value.
What I am wondering is who bought those 3.6B shares -- that just slightly more than doubled the prior 3.4B O/S -- in 2021 after Nixon stopped filing but before he was sent to the Expert Market. Was that all retail, or did someone buy (or was given) a majority interest?