1 BAPI Automation
In case we are speaking about huge amount (100, 1000, 10000) of data, I would suggest to use SAP BAPI, check this documentation https://docs.uipath.com/activities/docs/about-the-sap-bapi-activities-pack
To make the life of user easier, my colleague @Akihiro_Nishimoto with his team developed so called UiPath reusable components for SAP, check this page: https://connect.uipath.com/community/profile/akihiro-nishimoto-1ddfdb/components
There are a lot of predefined and prebuild templates and workflows which will help you to work with huge amount of data. SAP ECC and SAP S/4 HANA are covered
2 UI Automation
In case you have an excel list just with a few lines or BAPI is not available for your use case. SAP WinGUI automation is a great way how to read the data from Excel and enter them into SAP. You have to enable SAP GUI scripting https://docs.uipath.com/studio/v2020.4/docs/sap-configuration-steps
3 Third option - is not just bad there are no reasons to combine SAP built-in scripts with UiPath.
The whole flow can be done with UiPath only.
The less tools you are using for automation, the less maintenance issues you have. Just stick to UiPath Studio, which is covering all use cases. See above Point 1 and Point 2.
Best regards, Lev