I am using STM32L081CB controller with 128K flash and want to change STM32L081CZ with 192K Flash. I don't find any direct option to change the same in the STMCUBE. I want the entire project remains same including the PIN mapping.

[Uwe Bonnes]

As long as you do not want to use memory or devices only in STM32L081CZ, use the binary produced for STM32L081CB for both.

[MM..1]

And edit ld file to set larger flash

[Uwe Bonnes]

No need to change linker if there is no need for the additional flash...