Assign Radio Buttons in Excel User Form to a Group at Runtime

In the following vba code from Excel 365 I am creating a number of radio buttons. I cannot seem to assign them to a group for later use in code.
I have tried using .Group and .OptionButtonGroup but neither come up in intellisense. Its like the Microsoft Forms 2.0 Object Library is not referenced, but it is. What am I missing?

TIA.

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see big yellow banner - how to upload your workbook - far easier then to give you suitable in-context solution.

The reason I requested a workbook was to be able to see the solution worked in-situ, however a year or two back I produced something similar that was expandable at run-time.
It is based on block modules of ten questions, to expand the questionnaire form simply add another block of questions to the sheet/table by inserting above the summation row.
Press the button and a second page is added to the multipage (it became an exercise in maths/algebra rather than coding) - this approach may be of some relevance to what you are trying to achieve.

You can group them by specifying the GroupName property after you add each one. It's pretty odd to have different groups within the same frame though.

The groupname only affects which ones can be true at the same time. There is no runtime equivalent of the design time grouping if you want to manipulate multiple controls at the same time. You'd either have to use a separate frame for each group, or use something like a collection/array and process each item the same way. It wasn't really clear to me what the OP was doing though.

I have combined a simple runtime procedure with a class module to intercept the button choice, this may help visualise the choices made and may assist in coding I.D.