I'm interesting in hearing what exactly you think this would look like.
1 Chronicles 16:34 O give thanks unto the Lord; for he is good; for his mercy endureth for ever.
Grace is for sin itself as the state of being and condition of man (not to be confused with any resulting acts from acting as established actions). Mercy is for the consequences of sin brought forth into action, and is administered to remove or curtail consequences and/or give strength to bear up under those consequences.
Salvation is ontological, meaning the human hypostasis (individual substanding personal reality of existence) is translated into Christ via hypostatic union (just as Christ’s humanity and divinity are joined), thereby causing man’s internal resurrection unto spiritual life to have communion and the status of partaking of the divine nature through Christ alone (because His divinity and humanity are inseparable and unmixed, illustrating why Christology is a vital aspect of belief).
The lost and unbelieving have no such means of having their ontology changed. No spiritual resurrection in this physical life. So their physical resurrection is devoid of spiritual life. Death is cessation of communion with environment of origin, not annihilation, etc. So this aeviternal state of being for the spiritually unresurrected is an everlasting specific kind of separation from the Lord (Christ, who is God).
This means that there is no means of administering grace; for grace is the divine influence of God’s nature upon man’s own, and there is no means for the unredeemed to partake of the divine nature as their ontology is not translated via hypostatic union (by the hypostasis of faith). Therefore, there is no functional manner in which grace is available to those who have died without Christ. The functionalities are beyond the parameters of divine order for the creation. (And this is why there is urgency for salvation in this physical life.)
So what remains is God’s mercy enduring forever on behalf of those who are in His presence (enopion), but not in the prosopon (presence) of Christ by ontological joinging of hypostases (sons as joint heirs by the spirit of adoption). This mercy gives the unbelieving the ability to bear up under the aeviternal state of being they are in by default. It cuts short the worst consequences and is the only means of them being able to endure their everlasting existence of not being in Christ while still being outwardly in the presence of God.
So even the self-inflicted torment of the lake of fire is bearable because of God’s enduring and unending mercy. Though not in the sense it is for the redeemed at all, this is still a gradient of “salvation” for the unredeemed compared to what their everlasting existence would be apart from it. God’s mercy is the ONLY thing that keeps the torment from being the torture that so many accuse of God, and it being a verb.
Torment is a state of being, not the action that God takes toward those in the lake of fire. And God has mercy upon that state of being for all aeviternity. Forever. It’s His very nature to be and do that. But there is no functionality in creation for anything else, for the divine order was violated in the beginning; and every man is culpable for their own condition after frustrating grace.