I have a Form which source is a SharePoint list, within the form are a number of combo boxes which update the respective SharePoint choices columns.
I didn't like the look of the form with the combo boxes and due to the volume of choices columns, I want to replace them with sliders where it seems feasible.
There's about 20 Choices columns where the values are text.

I removed the ComboBox in the first datacard and placed a slider input and added a label with a bunch of IF statements to update the label with appropriate context to the 1-5 values, the label text matches the choices.
However, now I need the datacard to update the SharePoint list's choices column and I can't get it to work.
I've used a previous post here which covered this same issue, but the solution offered there does not seem to work for me.
For reference, it's this post: Solved: Re: Pass global variable value to select drop down... - Power Platform Community (microsoft.com)
I've tried the below on the Default property of the ComboBox, with the intent to just make the Visible property false after.
LookUp(Choices([@'Skills-Matrix'].'Presentation Skills'),Value = SliderContext_1.Text)
However that did nothing for me.
I added the below as the OnChange property of the slider
UpdateContext({DCV5ID:Slider1.Value})
The context variable gets updated but the Update property for the DataCard doesn't update the choices column with the below:
LookUp(Choices([@'Skills-Matrix'].'Presentation Skills'),Value = (DCV5ID)
For testing purposes, I modified one of the choices columns in SharePoint where each string was replaced by a value between 1-5
I then used the below as the Update property for the DataCard
LookUp(Choices([@'Skills-Matrix'].'Presentation Skills'),Value = Text(DCV5ID))
This successfully updated the choices column I modified, but I can't get the choices columns for the other datacards to function in the same way.
Am I making an obvious mistake with the above?
Is there another method to updated a choices column using a slider in a form?