Demo Server blog https://sapes5.sapdevcenter.com/sap/bc/ui5_ui5/ui2/ushell/shells/abap/FioriLaunchpad.html#EPMProduct-shop
Fiori deployment Umgebung  https://www.sap.com/documents/2018/02/f0148939-f27c-0010-82c7-eda71af511fa.html

Sap experience https://experience.sap.com/

Uidoku
https://sapui5.hana.ondemand.com/