Is it possible to set the app in a way that it shows the activities done weekly, monthly etc..? Garmin shows only the activities 7 days ago, 4 weeks ago and so on. It's very useless if someone whant to plan the activities weekly and check the progress.

Yes, in Menu » Activities » Running (or another category), you can see 4w and yearly reports (where there are also the monthly totals). Then, you can use the Reports section of Garmin Connect Web, and especially the Progress Summary for more granular reports. And you can also connect GC with Stava, and use Strava's reports, if you prefer them.

Thanks Trux but it isn't what I'm looking for. I need to know the activities I did from Monday to Wednesday, Saturday etc. I don't need to know the activities from Wednesday to Wednesday for example.

The same for the month or year. I don't need to know the activities that I've done from the 3 of July to the 3 of august. I need to see them from the beginning of the month to today or from the beginning of the year to today.

I know I can see it on Strava but I would like to see it on Garmin Connect