Hello Sidhartha Mudrakola,
For 3SL lawsuit cardinal idiosyncratic extensibility disposable lone successful customizing tenant, You tin not alteration the cardinal idiosyncratic extensibility successful improvement tenant
For much info, You tin notation the beneath KBA
You tin not setup a connection setup to deploy customized hold UI5 exertion successful Development Tenant.
For much accusation astir creating a Custom UI, delight travel the documentation under:
- UI Development
- Develop an SAP Fiori Application UI and Deploy it to SAP S/4HANA Cloud Using SAP Business Applicatio...
- Create a SAP Fiori App and Deploy it to SAP S/4HANA Cloud, ABAP Environment
- Consuming Services successful a UI
For much info, You tin notation the beneath KBA
Best Regards,
Pooja