I just want to know if it's possible to put the bundled Javascript file into separate files and host it on a CDN server, would this improve speed?

If you look at the image below you will see that the JS file delays the page loading.


Also, a big culprit of delaying page load is the site.webmanifest file, now I know you cannot host this on a CDN, but is there anything that can be done to stop such a small file taking over half a second to load?