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The TDA2030A has a max supply rating of 44V.
Half (non-bridged) of the "200W" amplifier circuit is shown on the datasheet of the TDA2030A. It is shown with a supply of 39V and its output at clipping into 4 ohms is 35W. 35W into 4 ohms is 33.5V p-p so the voltage loss is 39V - 33.5V= 5.5V.
When this amp is bridged then the current is doubled which will increase the max voltage loss. Maybe the loss at each amplifier side is 7V. Then if a 42V supply is used, each side has a max output swing of 35V p-p. The total swing into a 4 ohm speaker is 70V p-p which is 153W RMS.
Into 8 ohms the power will be a little more than half which is about 80W RMS.