Hi Brian,
There are some good suggestions from other community members below.
A number of performance and productivity improvements were made in ArcGIS Pro 2.8, and we would recommend that you upgrade to 2.8 if you have not yet done so. Some of the key improvements are noted in the What’s new in ArcGIS Pro 2.8 help topic.
While the above improvements will positively impact users who were experiencing problems in the areas where performance was specifically addressed, performance issues are complex, with a number of contributing factors. We acknowledge that ArcGIS Pro 2.8 will not provide a remedy for every suboptimal performance issue that users could potentially encounter, and as such, 2.8 may not resolve a specific issue you may be experiencing.
From the troubleshooting link that Dan shared, we'd be interested in your 'Can you run it' results and Performance Assessment Tool results if you run those.
Whether the machine meets the minimum system requirements and how it performs when running PAT are good indicators to help set the expectation of the performance you can expect to achieve when running ArcGIS Pro.
I hope that sharing these resources helps. If you have specific workflows or data processes that demonstrate a performance issue in ArcGIS Pro, we would like to work with you directly to understand and document those so that they can be assessed by the development team.
