@StretchFredrik is correct you cannot grab the file if its 80ish MB and over.
1. You will have to create an Azure Logic App to do it, since it supports Chunking
2. You can use an Azure Function (or logic app) as it will also allow you to support Chunking to get the bigger files into Azure.
Essentially you will create a download URL from SharePoint, pass that to an Azure Function or a Logic App and use one of those services as a go between.
I guess it would be possible if you mapped file paths in Azure Storage to use the Copy File Action as well.
I mean you have other things like Azure Data Factor, and PowerShell / Runbooks and a few other options but you asked for Power Automate specifically.
I mean, this all also means you could build your own Web API to support chunking, passing it the detail of what file to move(download there in Blob storage) and it could do it.
Just not in Power Automate specifically.
If these suggestions help resolve your issue, Please consider Marking the answer as such and also maybe a like.
Thank you!
Sincerely, Michael Gernaey