Calligraphy and painting competitions are rare. Generally, when there are cultural festivals and the like that need to be promoted, there will be calligraphy competitions, but the difficulty of calligraphy competitions is that it is really a technical activity. Personally, if you don't practice for a while, you will immediately regress. Because I didn't practice for a while, I immediately became almost an entry-level student, and finally gave up studying art.
The competition depends on what needs to be promoted and the support of sponsors. As long as it is for the public, everyone can participate. If you have a special student, you may not win. It depends on whether the work can "stand out".
I hope I can help you. Good luck.