Hi @Nanfa Kumswa ,
Thank you for your post in our forum.
Migrating from SharePoint 2013 to SharePoint 2019 is not supported. To migrate from SharePoint 2013 to SharePoint 2019 we must first migrate to a temporary SharePoint 2016 farm and then migrate to SharePoint 2019.
You could refer to this answer, which may help you a little.
Migrate SharePoint 2013 content database to SharePoint 2019
Should you have any questions or concerns, please do feel free to contact me.
Yours sincerely,
Renjie Sun
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