Extract attribute/value pairs from meta tags in HTML body of email that arrives in O365 shared mailbox then inject into table in Excel saved in 365 Sharepoint

[KJSawyer]

The subject pretty much says it all. I have emails arriving in a shared mailbox in O365. They contain HTML which includes several attribute/value pairs as meta tags similar to this:

    <meta name="blah1" content="Jenny">
    <meta name="blah2" content="8675309">
    <meta name="blah3" content="Peas and Carrots">
    <meta name="blah4" content="Forrest">

As messages arrive, I need to extract these attribute/value pairs then inject them as a new row into a table in Excel stored in SharePoint 365 whereby the attribute names correlate with the column names. Bonus points if a new column is automatically created if/when a previously unseen attribute is detected.

I know how to trigger the automated flow based on the new message arriving in the shared mailbox. I know how to pull in the body of the message. But I'm not sure what tool/function to use to find the meta data and shove it into a new table row in Excel. I've searched here and found a few things that are close, but not quite close enough to fill in my knowledge gaps.

Thanks in advance for your tips and hints!