Thank you for sharing the exercises you find useful.
I think you could integrate some of them more into the virtual world - like for example "Name 5 things you see" can be turned into a small point and click game. Another opportunity - 3 things about hearing. The other senses are physical and not relevant to a video game.
The same applies to the breathing exercise - it could be a small video game. Maybe even include microphone sounds - I have been researching that option and will come back to it some day.
This is not criticism but a challenge to do more. I think there are a lot of (mobile,web) self-help apps, including the famous SuperBetter which was among the first, that fail at making the exercises actionable and instead rely on self reporting. But video games are a medium that is more interactive! It has a lot of potential to be very impactful. Unfortunately game studios predominantly focus on violence but we as indie developers can and are changing that little by little. There should be more games that include such useful exercises as those you refer to.
Good luck and keep going!