This lichen-inspired number set matches the Lichen Letter Set found here: https://social.thangs.com/m/172431
See here for video: https://youtu.be/1RTVPXUJCFI
Other letter sets:
Wavey:
Letters: https://social.thangs.com/m/305534
Numbers: https://social.thangs.com/m/305538
Lichen:
Letters: https://social.thangs.com/m/172431
Numbers: https://social.thangs.com/m/177028
Geode:
Letters: https://thangs.com/mythangs/file/791222
Numbers: https://thangs.com/mythangs/file/791233
Cracked:
Letters: https://than.gs/m/895475
Numbers: https://than.gs/m/895477