Thank you for reaching out to us on the Microsoft Q&A forum.
Please search for "colItemsCollection" in the Power fx search bar.
We tried it on our end, and it worked perfectly. Kindly refer to the screenshot below:
Please don't hesitate to reach out to us if you have any other queries.
If you found the information helpful, we would greatly appreciate it if you could acknowledge it by selecting the Accept Answer & Upvote options.