You can find the changelog for the free version by clicking this link to WordPress.org.
You can find the changelog for the Pro version below:
= [2.0.3] - 24 May 2023 =
* Fixed: [tag_groups_post_list] shortcode tag parameter not working with custom taxonomy tags, #86
* Fixed: Fatal error with post count, #69
* Fixed: Tag groups shortcode causing fatal error, #85
* Fixed: Remove Broken documentation links in Gutenberg blocks, #88
* Fixed: Remove "Try Premium" link, #76
* Updated: TAG GROUPS Spanish translation April 2023 update, #70
* Updated: TAG GROUPS French translation April 2023 update, #74
= [2.0.2] - 12 Apr 2023 =
* Update: Update Tag group admin sorting method, #52
* Update: Move "search for settings" on settings screens, #47
* Update: Update footer credit, #50
* Update: Update tag group admin "Add New button", #51
* Update: Remove large blank area on Admin screen, #53
* Update: Change top banner to blue color, #46
* Update: Change Upgrade to Pro links, #49
= [2.0.1] - 20 Mar 2023 =
* Update: Accessibility Improvements for settings area, #35
* Update: Update title icons, #31
* Update: Include an "Add New" button for taxonomy groups #34
* Fixed: Small " issue with sidebar promos, #30
* Update: Remove Beta Tester Feedback, #37
= [2.0.0] - 28 Feb 2023 =
* Update: TaxoPress Move and General cleanup
* Update: Added Pro sidebar, #24
* Update: Documentation link updates, #22
* Update: Remove the icons in Gutenberg blocks, #15
* Update: Merge the Tools and Troubleshooting tabs, #12
* Update: Remove 3 tabs from Troubleshooting, #11
* Update: Remove the "About" menu, #10
* Update: Remove freemius dependency, #8