Some translations set poetry farther to the right than the rest of the text to show that it is poetry. The ULB does this with the poetry in 48:15-16, and in 48:20.
The blessing of Jacob is given to Joseph, and his sons Manasseh and Ephraim. It is probably distinct from inheriting the promises Yahweh gave to Abraham because Scripture talks about all of Israel's descendants inheriting those promises. (See: [[rc://en/tw/dict/bible/kt/bless]] and [[rc://en/tw/dict/bible/kt/inherit]] and [[rc://en/tw/dict/bible/kt/promise]])