Hi @Stavripal,
Generally when users collect and manage data with row-level permissions
features they do not check/they happen to forget to check Require authentication to see forms and submitted data
as outlined in the support article Row-Level Permissions. When the same is unchecked users are not able to view the data collected by themselves as outlined in the article.
Would you mind going through the support article. It should help you solve your issue. Do reach us back if you are still facing the issue.
As a reference, maybe you could also view the post discussed previously that covers the same issue:
Note: Users are not able to see the data for those missed as outlined above. However, if they follow the instructions outlined in the article they should be able to see for new submissions.