As for oucher, you’d probably have to write your own program or script depending on how Dreame’s bump works. For Roborock it watches a logfile for bumper events, so I wouldn’t be surprised if you can find something similar in Dreame or even something like /dev/sensor1 that you can poll.
Voice pack should work: https://github.com/Findus23/voice_pack_dreame
As for oucher, you’d probably have to write your own program or script depending on how Dreame’s bump works. For Roborock it watches a logfile for bumper events, so I wouldn’t be surprised if you can find something similar in Dreame or even something like /dev/sensor1 that you can poll.