Migrate infopath forms to sharepoint online:

Migrate infopath forms to sharepoint online:

How do I migrate InfoPath to SharePoint Online?

InfoPath enables developers to build custom forms, customize List/Library forms, customize workflow association, and task forms. 

InfoPath forms (XSN files) can be migrated, but some forms may not function without remediation. 

SharePoint Online classic sites support InfoPath forms but not modern sites. 

Migration Limitation:

1. Modern site templates do not support InfoPath forms. The browser based forms would be displayed as XML.
2. InfoPath forms are currently not supported on the Modern experience list, it can only work in the classic experience list.
3. InfoPath forms with SOAP calls and Managed code are not supported in SharePoint Online.
4. InfoPath forms that leverage people picker fields need to be updated with the new user's identity post-migration.
5. After migration, the User or site owner needs to re-publish all the forms into a new list or library. 
6. Users must implement required changes to make it work in SharePoint Online.

Recommendation:

Site Owners need to ensure the InfoPath forms function correctly post-migration.

I hope the above information will help you to resolve the issue, in case of any queries/questions regarding the above mentioned information then please let me know. I would be more than happy to help you as well as resolves your issues, Thank you.