The following posts may be of help. The first is for the core Templates plugin, but the process is the same. One way to trigger Templater is the command: Templater: Open Insert Template modal and choosing the template you made with the Templater code in it.
Only typing {{date}} into a note isn’t going to do anything. These are variables to use with the core Templates plugin. See the templates help section.
Check if Templates is turned on in Settings > Core Plugins.
Set a template folder location.
[Screenshot 2023-04-06 at 13.31.34]
Create a note, say note template, and put it in the location you entered above.
The contents of the note template should look something like this starting on line 1:
---
creation date: {{date}} {{time}}
alias: []
…
There is more to be said on this subject, which might not be very clear from the documentation.