Yes absolutely. On an earlier thread, I mentioned that Rick Evers (the Dutch reporter) thought it was interesting that OS (in his Dutch TV interview when the revelation of the names first came out) referred to the "production" of his version. This was Rick Ever's GMB interview - he was hinting heavily. He is a very experienced royal reporter.
I don't know if you ever listen to The To Di For podcast, but the guest for the most recent one (a Hollywood entertainment lawyer who also has a podcast) also is musing about collaboration, and avoiding the paper trail mistakes of Finding Freedom. There have been a few commentators over the last few days talking about "a journalist" hanging around various hotels near Montecito. Also references to phraseology in the Dutch version that sounds quite different to the English version - more emotive.
OS himself contradicts himself all the time, saying he has no direct relationship with them, but then going on about how he hung out with Harry and other royals in clubs, that other journalists were snide about him always having the inside track on MM, that he became their trusted journalist (hence he was one of only 3 journalists at MM's last royal engagement), the comforting phone call from Meghan etc etc. The man can't help but name drop. His James O'Brien interview, though friendly, gives away quite a bit.