Post migration MySQL database validation

We are migrating from 5.5 enterprise mysql to 8.0 mysql enterprise edition. And we are migrating version by version like from 5.5 to 5.6 then 5.6 to 5.7 and lastly from 5.7 to 8.0 also os migration is there from the rhel5. 4 to 8.4 it's all okay but client want data validation value by value. Normal data validations like row counts, and checksum is not sufficient to client as data is senstive. Suggest any good tool, script or query to check value to value data validation