Optimizing Power BI dashboard

have created a dashboard with custom visual python plots with 5 slicers/filters. Now both desktop and report are taking lots of time to load with every filter change (30sec to 1min) for each plots.

I have optimized all the codes to basic level ( removed all the power query and loops in the code) but still facing the same issue.

Need an power BI expert or consultant who can take a look at our dashboard and offer a solution for our dashboard performance issues.