Hate it when that happens.
I haven't worked with a Mantis. But I've worked with several Q500 boards, the similar 350QX boards, a couple of the Typhoon H and a couple of random others. The best I can say is "maybe". But way more than half were eventually recovered. Always had to replace the main control Mosfet, which was always damaged, but sometimes not visibly. Various capacitors around the board blow out, and those are usually visible. They can be a nuisance if the board surface around them gets blown away. The mosfets that feed power to the motors are often damaged, and may or may not show signs. Tracing gets blown out of the board, and is sometimes difficult to replace. The bad thing is that small parts just sort of disappear, and it's hard to spot their absence.
There are challenges in the IMU and the CPU. Those almost never show damage. They just don't work when you get everything else fixed. The IMUs are difficult to successfully replace. I have NEVER successfully replaced the CPU. For some reason, the replaced CPUs always display permanent low voltage, and will not allow the drone to start. There are a couple guys on the Forum much more familiar with circuit board stuff than I am. One of them may be able to tell both of us how to replace a CPU.