Should he focus on missed prayers and not offer the regular Sunnah prayers?

Can You Make Up The Fajr Prayer after Praying Dhuhr?

It is not essential to form the intention (niyyah) of offering the prayer that is currently due or of making up a prayer that has been missed

She is confused about purity following menses; what should she do?

She used to pray but she was not aware of the obligation of ghusl after menses

She stopped praying when she was sick, then she died; do her heirs have to do anything?

Her nifaas (postpartum bleeding) continued for nine months and she did not pray during that time

They lived under Communist rule and did not know anything about praying and fasting; do they have to make it up?

Expiation for not praying

He used not to do ghusl for janaabah out of ignorance; should he make up the prayers?