Recover activities from To do

Hi, yesterday I have deleted activities from my To do but now I need to recover them.

I have tried a restore following the instructions provided at this link

https://support.microsoft.com/it-it/office/creare-modificare-eliminare-e-ripristinare-le-attivit%C3%A0-30346281-30d4-4d6b-a6fa-55beca8d38a3

but the elements I have deleted are not present in the folder Deleted Mail (Posta Eliminata in italian).

I hope something can be found in the trash but I don't know how to do.

Anyone can help?

Thanks

Alex