I heard the other day two people in shul discussing bugs
And they mentioned Rav belsky
They also said that when bugs are frozen their eyes pop out which takes away the status of a בריה so we can use ביטול to make it מותר
Considering that freezing for extended periods of time is commonly used to preserve insects for display and collections, this is highly doubtful.
To quote one bug collection website:
“freezing is a preferred method of killing insect specimens. Most specimens will die over night but some cold resistant insects may require a week or more to die. Kept frozen, specimens do not dry out and can later be processed by pinning and mounting them, eliminating the need for a “relaxing jar” or procedure. Once the specimen is thawed, legs and wings can be moved to position them before letting them dry for display. They will also retain color patterns such as eye colors in horse and deer flies that quickly fade when the specimen dries.”