JSON_SET not recognized as a function (BigQuery)

I'm using DataSpell as I work on our dbt code, which uses BigQuery SQL.

The theme I use nicely colorizes errors in a dark orange, which really makes them pop. Fabulous, except that I use a lot of JSON_SET and it doesn't recognize the function.  (this is a regular built-in function in BQ SQL, just like JSON_VALUE, which you can see from the screenshot it does recognize)

Is there any way to add it on my end, or is it something in the plugin?