If you’re using Daily Notes or the even-more-powerful Periodic Notes by @liam, you can take advantage of templating to generate the text of the dates of your notes.
Turns out this provides a neat way to create links to dates in Fantastical via the app’s URL Scheme.
Including e.g., this text:
[🗓](x-fantastical3://show/calendar/{{date:YYYY-MM-DD}})
will generate a link to the daily/weekly/monthly note’s date in Fantastical in your notes.