SharePoitn List ToolBar Button to Run Flow

VeeExcelLearn Here's my recommendation (quick & easy solution - might need end user training):

1. Create a power automate flow with "For a selected item" trigger
2. Get list filtered list items as per your requirements
3. Then you can send an email using outlook connector - Sending a beautifully formatted email from Power Automate (Flow) 

This is how you can trigger the flow: 

Another options:

1. SPFx list view command set - It will added to command bar but need development experience
2. JSON formatting - Button will be added next to each list item

Also, check replies on my similar thread at: Custom action visible on the toolbar 

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