Is it permissible to say "in the worlds You are praiseworthy and glorious" twice in the last Tashahhud after finishing "O Allah, bless" and "O Allah, have mercy," and is it permissible to say "You are in the worlds praiseworthy and glorious" instead of "in the worlds You are praiseworthy and glorious"?

What was mentioned about the mother and sister regarding the error in prayer is permissible, entails no sin, and does not invalidate the prayer, even if it occurred in the Abrahamic prayer. And it is sufficient to say "Allahumma Salli 'ala Muhammad (O Allah, send prayers upon Muhammad)" for those who consider praying upon the Prophet a pillar in the last tashahhud.