Uh what we do know is that he wasn’t involved in a sign and trade and that no one has come to terms with him when it has happened with others. I mean there are literally deals that are public knowledge. To ignore those is to go full ostrich.
Of course he wasn't involved in a sign and trade because all of the talk leading to the offseason was how he wanted to be here and the front office saying they wanted to keep him. To change that, another team would have had to offered him a contract that caused him to say goodbye to Phoenix and also offering the Suns a package they'd accept in order to pass on their ability to match that offer. So the idea he hasn't agreed to a sign & trade yet being a sign he hasn't drawn interest doesn't hold much water as far as I can see. There are too many factors at play there.
You say that others have come to terms with teams but no
restricted free agent have and that makes all the difference. It is a very important distinction since UFA and RFA is played quite differently. For a team to come out early and admit they've agreed to a deal that the player will sign as soon as the moratorium is over would be giving the matching time even more time to stall them and allow more free agents to sign elsewhere while that money is spoken for in regards to the team signing the player to an offer sheet. No team looking to get a restricted free agent to sign will grant the matching team extra time because that would be foolish, they'd want that time lessened if anything but that won't happen, they certainly don't want it expanded.
If it were the Suns in the position of trying to sign a restricted free agent right now and they came out and said they reached terms to sign them as soon as the moratorium was over, they'd be ripped to shreds on this board for doing that. It only hurts their odds in free agency as a whole to do that. Unlike other deals that are agreed to it's not a simple formality to submit the deal to the league office and it's over, that player is theirs. The waiting period of restricted free agency is at play. That's why we haven't heard anything and won't unless a sign and trade is done, which is highly unlikely in Oubre's case.