Why is sharpedo blocked in image searches on DuckDuckGo and Bing, but not Google?

I very rarely meet anyone who says “truck” - most people I know say “chruck” and when they say “truck” it sounds very forced. Same with other words that start with “tr”. They push the word through their teeth rather than putting their tongue on the roof of their mouth.
Enunciation is key.
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Nobody’s flagged up sharpedo to their CSAM filter team yet.
This sentence is cracking me up
Why is sharpedo blocked in image searches on DuckDuckGo and Bing, but not Google?