Can someone please tell me why I am no longer able to edit products we have as a Bundle?

Editing items in your account applies to any QuickBooks Online (QBO) version, Laura. Let's perform some troubleshooting steps to sort out the issue.  

To verify, could you tell me if you encounter any error messages when attempting to edit the bundled products? Also, may I know what user access you're using when logging in to QBO company? I'd appreciate it if you could attach a screenshot or give additional details about this so I can provide a timely solution. 

In the meantime, you can perform some browser troubleshooting steps to determine if this is related to the cache files issue. To start, open your account using an incognito mode. This does not store cache files that can be corrupted and cause odd behaviors when running web-based programs. Below are the shortcut keys you can use:

• Google Chrome: press Ctrl + Shift + N
• Mozilla Firefox: press Ctrl + Shift + P
• Microsoft Edge: press Ctrl + Shift + N
• Safari: press Command + Shift +N

Once signed in, edit the Bundle again and check if you can now do it without issue. If this works, clear the cache of your regular browser to eliminate piled-up data that might cause the issue. If the same thing happens, I recommend using another supported browser or device. Might be that the current one you're using has a temporary issue with the program. 

Just in case you want to change the type of your item, you can easily do it by performing the steps in this article: Change product and service item types in QuickBooks Online.

I'll keep this thread open, so you can drop a reply below if you have other concerns about editing your bundled products. I'm willing to share guides and way-arounds you can use. Keep safe.