Copy SQL Server Maintenance Plan between instances on same server
Here you go:
I believe only Windows server can have only one copy of SSIS installed. So even if you have seven instances of SQL on the same box, you'll only have SSIS devoted to one of them. SSIS will work for all them but will initially only be aware of one of them. I think the following link still holds the answer by modifying MsDtsSrvr.ini.xml to make SQL Server SSIS aware: https://www.mssqltips.com/sqlservertip/2061/how-to-manage-ssis-packages-stored-in-multiple-sql-server-database-instances/