I second the camps and showcases comment.
The coaches from the school my catcher ended up at (D3) recruited and invited him to the team based only on video, phone/email conversations, and one visit to campus. The HC's exact statement when my son asked about what they were looking for in a catcher was "We are looking for someone who can defend the field above all else. Ability to catch, throw and block as well as control the game from a defensive standpoint are paramount." That said, I agree with C2019 about hitting, whether the coach comes right out and says it or not. You see it all the time, especially college and above. Austin Hedges is a great example. By most measurements he is the best defensive catcher in all of baseball but his 2019 batting average is below .200 currently and he seems to have planed out to a level that most analysts think he will not end up an everyday catcher if something doesn't dramatically change with his offense.