Please help me understand why the two variants of the bcp command listed below fail at adding data to the DB.

The toy csv-file’s (it is in UTF-8 with BOM and has rn at the end of each line including the last one) content is as follows:

1,"qwe"
2,"rty"
3,"uio"
4,"äöü"

The test table was created with the command

CREATE TABLE Import_data_test_1([column1][integer], [column2][nvarchar])

Firstly, I tried the bcp command with the following switches:

bcp sn_test_2.dbo.Import_data_test_1 in D:UuuTest_1.csv -w -T -t , -r n

The result:

Starting copy...
SQLState = S1000, NativeError = 0
Error = [Microsoft][ODBC Driver 17 for SQL Server]Unexpected EOF encountered in BCP data-file

0 rows copied.
Network packet size (bytes): 4096
Clock Time (ms.) Total     : 1

Also, I attempted to do it interactively like this:

bcp sn_test_2.dbo.Import_data_test_1 in D:UuuTest_1.csv -T

Enter the file storage type of field column1 [int-null]:
Enter prefix-length of field column1 [1]:
Enter field terminator [none]: ,

Enter the file storage type of field column2 [nvarchar]:
Enter prefix-length of field column2 [2]:
Enter field terminator [none]: (comment: I tried left it empty and enter n here, it did not make any difference)

Do you want to save this format information in a file? [Y/n] n

The result:

Starting copy...

0 rows copied.
Network packet size (bytes): 4096
Clock Time (ms.) Total     : 1

I would appreciate explanation why it fails in both cases.