Welcome to the site. I'll start with a general response. As a 2021, his velo is plenty good to get attention with even the better JC programs. What they will be looking for is that he has decent command, decent secondary pitches and, most importantly, that he can get good hitters out regularly. Is he playing travel ball with an organization that plays high level competition?
Also, as general FYI, JC's are last on the recruiting totem pole, so they tend to recruit late. So, don't panic. You have found a great resource (this site) to make the process a bit less daunting. You can ask questions in the forum, as you did, and you can also search threads by topic. Your son needs to be proactive with his recruiting efforts and reach out to schools he is interested in. He should utilize any qualified advocates as well. This may be his P coach, travel coach, HS coach or other, depending on their reputation and how well they are connected. He should have a good video made, particularly considering the uncertainty of any games/events happening any time soon in many areas. There are plenty of guidelines for that here as well.