Hi @frana_brusca ,
The keyboard is part of the upper case assembly and this is considered to be a complete unit.
Here is a link to the service manual for your IdeaPad.
Scroll to p.53 to view the necessary pre-requisite steps and then the procedure to remove the upper case. (although it seems that you may already be there)
On p.66 Item #2 you will find the replacement part numbers for all the different country and colour specific palmrest/keyboard assemblies that are available for your model Ideapad. The part number for your palmrest/keyboard should be stamped somewhere on the underside of the part
If you search online using the appropriate part number only for your particular model you will get results for suppliers of the part. Be aware that some include the trackpad and others don't. You can use your own trackpad if you wish.
It is easier to replace the keyboard than to fix it as you can create more problems than what you had before you started .