A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
Microsoft is committed to delivering high-quality features to our users, and sometimes this requires additional development time. While I do not have specific information on the release date for the new checkboxes in Excel, I can assure you that Microsoft is actively working on this feature and will release it as soon as it is ready.
I will notice you here when the feature is released.
You may also raise a support ticket to Microsoft for more information on release date.
Please contact your admin/IT department create a support ticket via Microsoft 365 Admin Center> Support> New service request. Support team there will have the correct channel and resources to help you on it.
Get support - Microsoft 365 admin | Microsoft Learn
About how to find the admin in your organization, you can refer to How do I find my Office 365 admin
Or join M365 Insider to use it in advance