S3 or S2 mosaic

Good morning,

I have been using EO Browser so far only for processing of single images and I did it without any problems. But now I would need to create a mosaic of S3 images and probably also others of S2 images, and I can not understand how to access the mosaic generator from EO Browser.
Where can I find it? any documentation on how to use that?

It is currently indeed not supported to create a mosaic of several days in EO Browser. You can however do it using OGC services directly, e.g. using QGIS plugin or WMS service
Would that work?