But in this case I read a news sourced from Catalan Sport which said that Barcelona reportedly had prepared a sanction if Frenkie de Jong refused to be sold to Manchester United and the punishment was to exclude De Jong from the squad for this pre-season tour.
Obviously this is the opposite of what you say and it still has all the possibilities especially United are now trying to increase their bids to bring De Jong.
maybe the source you read is not very accurate how barcelona can impose sanctions on De Jong in transfer matters, it is impossible because Barcelona themselves have a debt to De Jong if barcelona starts threatening sanctions, De Jong party will definitely take legal action against Barcelona who have not paid arrears his salary and must be completed as soon as possible if barcelona wants to sell him. I don't believe the news sources you read. So far there has been no negative news between De Jong and Barcelona. even xavi really hope de jong can stay for the season to come.
There are a lot of rumors floating around at the moment. I have also seen the news where it says,
#de Jong has like an Instagram post of Barcelona not treating him well while the transfer talks are going on.
So, I think everyone can guess that any kind of media, whether online or offline, is willing to try to take any rumor about this and make it big news just because of publicity. I don't know if there is anything else to that news. De Jong has already told Barcelona that it is his dream club. I think even though it might not be the most intelligent decision to make, he is choosing to stay in Barcelona. And Barcelona is not planning to do anything stupid right now to change that.