Fastest way to Fetch Issue Api

Hi !,
I am building a gadget chart app for Jira by using forge custom UI (bridge). What I need is to get all issues with their fields. For example, if there are 6000 issues I need to get all of them with their issue type and assignee and show them in the chart. Because of the query limit Jira API (20 requests / 2sec), it takes more than 3 minutes to fetch all issues with pagination. Is there a way to make it faster?