On the page to select the spaces, there are opportunities to improve the customer experience:

Search

For Confluence, the only option available in the search box is "Space Name".
We need to be able to search for "Space Key", similar to what Jira has.

Sorting

For Confluence, you are not able to sort any of the columns.
We need to be able to sort the columns by clicking in the headers, similar to what Jira has.

Screenshots below for comparison.