Hi Uwe,
We are glad to announce that our Essential Studio 2020
Volume 3 Release v18.3.0.35 is rolled
out and in that release, We've provided the option to specify date format in
excel export. So please update your package to this version to include the
feature.
NuGet Link: https://www.nuget.org/packages/Syncfusion.Blazor/18.3.0.35
Release notes: https://blazor.syncfusion.com/documentation/release-notes/18.3.35/?type=all#accordion
We thank you for your support and appreciate your patience
in waiting for this release. Please get in touch with us if you would require
any further assistance.
Regards,
Vengatesh