Will Allah (SWT) forgive a remorseful woman who has repented and sought forgiveness after she massaged another woman, knowing the act was forbidden but not knowing it was considered akin to zina (fornication/adultery)?

Lesbianism among women is a grave sin. If you were aware of its prohibition, then you are sinful. Since Allah has blessed you with guidance, repentance, remorse, and abandonment of this evil, we pray for your acceptance and forgiveness from Him, in accordance with His saying, the Almighty: "And indeed, I am Forgiving to him who repents, believes, and does righteousness, and then is guided." You must stay away from bad friends and places of temptation, choose righteous companionship, increase good deeds, and occupy your time with what is beneficial.