- 🇦🇹Austria maxilein
For the time being may I add this:
There is the JSON:API Page Limit module and also JSON API Defaults (part of the popular JSON:API Extras module) to change the limit.
After you have installed the JSON API Defaults module go to
http://example.com/admin/config/services/jsonapi/add/resource_types/taxo...
and change the page limit at the bottom of the config form.
Then you can request a higher number of items with the query parameter page[limit]:
http://example.com/jsonapi/taxonomy_term/[vocabulary]?page[limit]=1000