You can generate proxy js client whith cli command :

abp generate-proxy -t js -u https://localhost:53929/

And customize this, However, it should send the request in the same format that the server requires. Finally, add ref to script generated in razor page same as:

<abp-script src="/client-proxies/app-proxy.js"/>

For more detail can be check: https://abp.io/docs/latest/framework/ui/mvc-razor-pages/static-javascript-proxies