Generally speaking: no. TRIM just tells the disk that it’s now okay to use this sector for wear-leveling.
But it depends on the specific implementation. It might even “fake” a zero-read after TRIM, without actually having zeroed it. But there’s also a command that can zero a sector. (wikipedia)
(According to the German version, RZAT is just required to return zeroes on read, but not to actually write them)
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