Microsoft Graph Api, Onedrive ou Sharepoint : how to get the current user read or witre role

Question

How to get the current user permission role of a folder (or file) with MS Graph Api ?

I try : https://graph.microsoft.com/[v1.0 or beta]/drives/[driveId]/items/[itemId]/permissions

but the role array is empty for all but the owner one...

I would like to show the user a specific icon if it can read or write in a folder.

Thx

--Edit 1--

the user didn't have direct permission to the folder but he is in a security group who have the read role.

the user can read (open) any information from that folder, i just need something to know if he can read AND write (or not) in the folder.

When i try to write without the good permission i got an 403 error, i whould like to know "before" that error that the user couldn't write on that folder..

--Edit 2---

I try all that the doc say : https://learn.microsoft.com/en-us/graph/api/permission-get?view=graph-rest-1.0&tabs=http

GET /drives/{drive-id}/items/{item-id}/permissions/{perm-id} => Roles empty

GET /groups/{group-id}/drive/items/{item-id}/permissions/{perm-id} => Security groups didn't have any drive

GET /me/drive/items/{item-id}/permissions/{perm-id} => Item (folder) is not in the user drive

GET /sites/{site-id}/drive/items/{item-id}/permissions/{perm-id} => it's not a sharepoint site

GET /users/{user-id}/drive/items/{item-id}/permissions/{perm-id} => Roles empty

What i don't understand is that i can read, list, add and remove file (if i have the write role) without any problem, but i can't see the roles list..

-- Edit 3 --

If you want to reproduce the pb foolow this :

• Create a user in Azure Active Directory (AAD), add to it a Microsoft Office 365 licence (in my case business) named "User1"

• Create a folder in it Onedrive for Business named "Shared"

• Create in AAD a Security group's (let named it "Readers")

• Share the previous folder with the "Readers" group and make it read only (in my case I use the onedrive online site to do that)

• Create in AAD an other User (with or without a licence) named "User2"

• Add it to the "Readers" group

Now, Go to Graph Explorer and type in this url in the input textbox :

https://graph.microsoft.com/v1.0/drives/[driveId of User1]/items/[itemId of "Shared" folder]/Permissions

you should get this result :

{
"@odata.context": "https://graph.microsoft.com/v1.0/$metadata#drives('...')/items('...')/permissions",
"value": [        
    {
        "id": "...",
        "roles": [], 
        "grantedTo": {
            "user": {
                "displayName": "Readers"
            }
        }
    },
    {
        "id": "...",
        "roles": [
            "owner"
        ],
        "grantedTo": {
            "user": {
                "email": "user1@mydomain.com",
                "id": "...",
                "displayName": "User1"
            }
        }
    }
]

}

Has you can see, the first roles array is empty, but the owner roles array is not..