Hello, spacecraftlounge. 

Yes, you can delete transactions by batch. However, there are selected transactions you can delete by bulk, like Invoices, Sales receipts, Refunds, and Estimates. Some transaction types not mentioned are unable to delete by batch.    

1. Click the Sales. Then All Sales. 
2. Choose the transactions, like Invoices, Sales receipts, Refunds, and Estimates. 
3. Click the drop-down menu under Batch action. 
4. Select Delete. 
5. You'll prompt to a message. Hit Yes to delete it.

I can see how deleting other transactions in bulk would be helpful. It would save time as you won't have to go through each entry to delete them. Rest assured that I'll relay this message to our team in concern here on my end and add your vote for this one.

You can also share your thoughts and ideas through your account. Our product development team reviews all the feedback we receive to ensure we’re meeting the needs of our customers. 

Here's how: 

1. Select the Gear icon at the top, then Feedback. 
2. Enter your comments or product suggestions then select Next.
3. You'll be provided a list of suggested Help articles related to your comment. You can read through them or select Skip and send message.
4. From the drop-down, choose the appropriate category, then select Send message.

For your reference, check out this link: How to Submit Feedback.

You can also read this article for more information: Void or Delete an Invoice or Other Transactions. 

However, If you mean the delete option aren't showing up, then let's open your QBO account using an incognito window. This to rule out the possibility of a webpage issue.

You can refer to these shortcut keys: 

• Press Ctrl + Shift + P for Internet Explorer or Firefox.
• Press Ctrl + Shift + N for Chrome.
• Hold down Command + Shift + N for Safari.

If it works, I suggest clearing the cache of your regular browser. Or use a supported, up-to-date browser, to have the best and most secure experience with QuickBooks Online. Then, you can now follow the steps above. 

Let me know if you have any other concerns. I'm always here to lend a hand and help you further. Have a good day.