When I do a data merge of a csv file the data displays as it should with multiple records. At this point I only have one page. When I insert another page and try to do a data merge the option to do multiple records is not available
Not really clear what the end goal is here.
On page 2 you haven't setup any data merge fields like you have on page 1.
On page 1 when you are inserting the multiple records it says it will generate multiple pages.
Why add the 2nd page?
Best video I have ever seen on Data Merge
There's also a part 2 to the video.
Well worth the watch.
Adobe's help site does explain this, but it's quite far down the page. The site is here: https://helpx.adobe.com/au/indesign/using/data-merge.html
However, if you set your data up on one page AND there are enough records to fill out several pages, data merge will populate additional pages.