Synchronize (Update) a Folder in LR Cl. – How Avoid EMBEDDED Preview?

Hello, in Lightroom Classic on Win, when I paste pics into a folder known by LR, I need LR to "synchronize" that folder to see the new pasted-in pictures (so this synchronizing is not any online thing). I always get "embedded previews", not better LR-created "Standard" previews.

In the Catalog Settings, in File Handling, I use

Default Preview Size: 2880 px

Preview Quality: High

Delete 1:1 Previews: after 30 days

Still when I synchronize the folder (i.e. let LR scan the newly pasted-in pictures), I get "Embedded Preview" and the only way to heal this seems a click on the line "Embedded Preview". Or what to do?

When I IMPORT pics via the Import Dialog, I know how to avoid "Embedded" and use "Standard" Previews instead (i.e. the LR-created previews). My Import Dialog is set to "Standard" previews, but the folder-synchronizing (no dialog there, thanks God) only offers "Embedded" previews. If I wait 30 minutes, still only "Embedded" previews in Loupe View (and there is no status bar in the top left corner that would indicate the creating of "Standard" previews).

So how can I get right away "Standard" previews when SYNCHRONIZING (updating) a folder? (Aware that the "Standard" previews take time and space. Still I want them.)

Thanks!