This is to meet MS recommendation for connecting to SQL Server using ODBC Driver connection strings:
Always specify multiSubnetFailover=Yes when connecting to the availability group listener of a SQL Server availability group or a SQL Server Failover Cluster Instance. multiSubnetFailover=Yes configures SQL Server Native Client to provide faster detection of and connection to the (currently) active server. Possible values are Yes and No. The default is No.
This is to meet MS recommendation for connecting to SQL Server using ODBC Driver connection strings:
https://learn.microsoft.com/en-us/sql/relational-databases/native-client/applications/using-connection-string-keywords-with-sql-server-native-client?view=sql-server-ver16