/tick command doesn't work outside of the console command line, putting it in a command block or .mcfunction file always produces a syntax error.
How to reproduce:
Place a command block containing "tick rate 100"
Trigger the command block and query the tickrate
Nothing changed, command block displays an unspecified syntax error
Environment
Windows 10, 23w43a, datapack containing mcfunctions for testing /tick, no experiments active
Linked issues
Comments 3
Sorry, realized that a few minutes ago. The empty syntax error is still weird though, so I'm going to leave the report up in case that is not intended.
Duplicate of MC-128155 then.
This is working as intended, see the change log: