We know that kolasis punishment in Matthew 25 is remedial but what about timoria punishment in Hebrews 10? Is that considered remedial even though it mentions the punishment as harsh?
No, timoria is the opposite of kolasis:
You have to click on the LSJ entry, the link does not work properly.
James, were you aware that Hebrews 10:29 is the only sentence in the entire Greek New Testament which contains the word “τιμωρια” (timōria)?