Qelectrotech Siemens Library |best| -

While the Official QElectroTech Repository includes generic electrical symbols, specific manufacturer libraries like Siemens are often expanded through community efforts:

: Sites like GitHub often host "contrib" libraries containing Siemens S7-1200 or S7-1500 symbols. How to Import Custom Siemens Libraries qelectrotech siemens library

If you find a Siemens library folder (containing .elmt files), you can add it to your setup: Official elements collection for QElectroTech. - GitHub qelectrotech siemens library