Hi @jmckee13,
How do you want to trigger the flow? Do you want to trigger the flow by selecting an item in SharePoint list using trigger For a selected item? Or do you want to Get items from the list then filter the returned items?
If it is the first scenario, I am afraid that it might be not possible to trigger the flow with multiple selected items. It seems that only one item can be selected. If you need this feature, please consider submitting a request on Flow Ideas Forum:
https://powerusers.microsoft.com/t5/Flow-Ideas/idb-p/FlowIdeas
If it is the second scenario, you flow could be triggered by a Button, then the action Get items. In the action Get items, using the Odata filter query to filter items. Then the action Create HTML table, sending an email with the multiple items at a time.
Please take the following screenshot for a reference.
The following docs could be your reference:
Using Filter Expressions in OData URIs
Build flows with HTML Tables
Best regards,
Mabel Mao
