Help with TDA2030A Amplifier circuit
You need to look at (and compare) the DC voltage at the + input of TDA2030.
You made a mistake in connecting the output of RV1 to the net between R6 and R7. Compare your schematic to those from the datasheet!

I would connect the output of RV1 only to C2. RV1 now pulls the DC voltage at the + input to around 0 V, then the TDA2030 can only work if it has a negative supply that is at a lower voltage than 0 V.
In case of a single supply solution the DC voltage at the + input needs to be about 6 V DC.
Do a DC operating point simulation and check the DC voltages of the TDA2030's inputs for both circuits.