MC-259979 was resolved by implementing a fix where the damage dealt to striders, blazes, or magma cubes is multiplied by 5 when utilizing the /damage command with the freeze type. However, the command feedback was not subsequently updated.
Note: This may be intentional, as the command feedback typically doesn't consider damage reduction from factors like armor or resistance effects. However, this issue specifically pertains to the command feedback not factoring in damage increases, which could be expected to behave differently.

steps to reproduce

1. Summon a strider

2. /damage @e[type=minecraft:strider,limit=1,sort=nearest] 4 minecraft:freeze

Observed: The strider received 20 damage, leading to its demise. However, the command feedback erroneously indicated that only 4 damage was applied, despite the actual application of 20 damage.
Expected: The command feedback should accurately reflect that 20 damage was applied to the strider.