أَلَمْ يَجِدْكَ يَتِيمًا فَآوَىٰ
Did He not find you an orphan and give shelter?
Ad-Duḥā and Ash-Sharh share an address to the Prophet, recollection of favors and concluding directives. These similarities support reading the two neighbouring chapters together.
Ad-DuḥāAsh-Sharh
Denial of abandonment; promiseExpansion of heart; ease
Earlier favors rememberedEarlier favors remembered
Orphan, petitioner and gratitudeRenewed effort and longing to God
The relation is thematic; it does not erase the boundaries between the two surahs.