So I will chime in here, at the risk of doxxing myself (and possibly getting in trouble in my office): I'm one of the people at the University that is probably most qualified to explain what's going on with regards to the information sharing/lack thereof.
Historically speaking, in the application review process, the Admissions Office would note artistic abilities. Play in the marching band? Noted. Take AP Art? Noted. Involved in community theatre outside of school? Noted. After the Admissions office enrolled the following year's class, they would be able to use the notes to run searches and create a list of names for particular interests/talents, which were sent to various appropriate departments on campus, including the Music Department for students who were either involved or expressed interest in being involved in music on their applications.
When COVID hit, the powers that be at the university feared that misinformation would run rampant, and so they streamlined communication with the enrolled class in May 2020: all information to incoming students was to come from Cherise James in ODOC/ODOS, so as to remove the possibility of rumors spreading about potential COVID restrictions for the Fall 2020 term. By default, then, individual departments were no longer contacted with the lists of students of interest. This policy was eventually deemed a success in terms of student enrollment retention and communication with families, and has been continued in subsequent years, and as a result the Admissions office has stopped sharing these lists entirely in order to prevent departments on campus from reaching out to students individually.
For a number of reasons, Music has been hit hardest by this change. Beyond needing to recruit for SOTOGAB (and that recruitment needs to happen over the summer so that incoming students can participate in SOTOGAB pre-orientation programming), Music generates revenue through private lesson fees with students to supplement salaries and other positions (accompanists, professional players for the ensembles as needed). Long story short, the Music Department is really hurting right now in terms of student involvement (even beyond SOTOGAB).
Now, where does that leave things? Basically since the summer of 2020, Music faculty have (rightly) been complaining about being handcuffed in terms of the relationship-building that they feel they need to do in order to sustain the Music numbers for all of the ensembles, not just SOTOGAB. Discussions have been had at administrative levels about going back to providing the list of names as requested by the various departments on campus (sadly, I'm not invited to most of those discussions, so I have no idea which way the wind is blowing on that decision-making). If you would like to reach out to your various influential friends in the Deacon Club or whatnot to try and press the importance of having a strong Music Department to help put pressure on administrators to change the current policy, I would happily encourage you to do so.