If you data is not being updated in PureClarity, then it is likely that your feeds / deltas are not running. Please check the following:
Configuration
Check that the "Product Indexing Enabled" and "Daily feed Enabled" are both set to "Yes" in the PureClarity Magento configuration. See "Magento 2.x - Configuration - Data Feeds / Indexing" for more information
Indexers
Double check that PureClarity indexers are set to "Update by Schedule". This is done in System > Index Management in the Magento Admin.
Check you have cron jobs enabled
Cron jobs allow background tasks to happen in Magento and are a vital part of the running of a Magento store. In order for the feeds to run, the Magento cron must be running as we use background tasks to generate & send feeds to PureClarity.
If they're not set up already, then please follow the instructions in the Magento devdocs to set them up.
As a short term solution, you can also run the following command:
bin/magento cron:run
Check for errors
If the above all looks ok, then check for errors, please see "Magento 2.x - Troubleshooting - Why are my Feeds failing with errors?" for more information