+1 to the FR
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Two workarounds in the meantime:
Use an SEDE queryan SEDE query. This only finds comments posted before the most recent data update (they update the data more or less every Sunday at varying times), but newer comments should be findable in the first few pages of the comment tab in your profile.
Ask a mod to search for you. You can ping me any time in AUGR, though sometimes I am asleep or otherwise afk, so this is not very convenient for you, but we have got a per user comment text search box that finds comments too new for SEDE (and even deleted ones).