Fonts are not loading properly

I’ve created a CustomUI macro that is built off of the FullCalendar library. That library contains some base64 icons to display some left/right icons, however I have no idea how I can give my macro permission to load those icons since they’re blocked.
2023-01-23 16_37_32
I’ve given permissions for inline scripts to load but given this is a base64 encoded font within the FullCalendar library i’m unsure as to how to give direct permissions to this exact font library, or how to just allow any base64 encoded fonts that the app attempts to load. Visually, this is how it looks within my macro
2023-02-13 13_05_46