Leaflet Map only shows on a Lighting App

Hi,
I was wondering if anyone has a problem displaying the map from leaflet onto a lighting component record page. I have my component but only display if I added to a lighting App but I need to add it to a record page.Thanks,
I’m following this tutorial -> https://www.forcetalks.com/blog/introduction-of-leaflet-map-in-salesforce-lightning-component/
I’ve tried these options, but they don’t work
https://developer.salesforce.com/forums/?id=9060G0000005RwNQAU