[Problems after the update.]

Got the same bug on a save that was made before the latest update and after the first 2 games I only see Overall Match Momentum as data. Games are vs Levante (email on February 23rd) and Athletic (email on February 26th). I've uploaded the save in the SICloud with the following name - "Barca - Data hub bug.fm". Let me know if any additional information is needed."

[Possession issue]

Noticed this as well. It seems like a similar issue that you mentioned from FM22 (sharing the thread in case it can be used as some sort of reference) .
 

It appears that teams are more passive and prefer to pass the ball around the back without going past the center and in turn our players unable to press well enough/the press isn't effective to prevent this. I've tried multiple ways to counter this - more aggressive pressing/tempo, trying to go heavy up top with up to 7 players playing in advanced positions but at best we settle for 50/50% possession while the AI has 0 shots on goal all game.

If more examples are needed besides the ones from OP I can also do some tests and send some pkms.

[TOO MUCH POSSESSION OF MINOR TEAMS]

I know you probably have enough examples by now from the beta and full release but I just had another extreme situation on one of my saves that I had to share out of frustration. 1022 passes, 100+ passes for each defender/midfielder, 919 passes in their own half to just 117 in the opposition half. PKM - AIPossession 2nd Example.pkm

My Scout report saying that they have a defensive mentality before the match.   

My tactics going into the match:  

Stats at full time with the heatmap (their entire team playing mostly in the own half)  

Sociedad players stats and their passes in their own and opposition halves:

Own Half:

Opposition Half:

[AI Possession massive]

Helping out here as I noticed this issue during my save as well. The team I faced played 4 at the back though. Prime examples can be seen between the 30-35 minutes, 40-45' and at the beginning of second half up until 53'. This is hard to spot on any highlights except for full match, but you can notice the AI's possession going ~5% up between highlights on Comprehensive for example. AIPossession.pkm

My tactics below, but I should note that as mentioned before me, I tried tweaking everything from personal instructions to oppositions instructions to the tactics themselves.  

Please let me know if you would like more examples or if would like this to be tested with different tactics.

Here are also the Opposition Instructions. Later in the match I switched off everything from DMCR down and just left the instructions to press/hard tackle on everyone from DR till DMCR. This didn't seem to help.