The Lake Of Fire is called the Lake of Fire And Brimstone (Sulfur)
HELPS Word Study states:
4442 pyr - fire. In scripture, fire is often used figuratively - like with the “fire of God” which transforms all it touches into light and likeness with itself.
The Greek word for sulfur is theion and is described as divine incense, because burning brimstone was regarded as having power to purify, and to ward off disease. The Jewish culture used sulfur in purification rites:
blueletterbible.org/lang/lex … 2303&t=KJV
In the Bible God can and does use fire not only to punish and correct but to purify. The word usage and meanings in “The Lake Of Fire” make that likely. The other reason why is because the Bible elsewhere states that God is the savior of all people. Especially of them that believe. Some are saved by grace in this lifetime others by fire in the next.