Neither has featured in the Red Rose's first three games of the 2018 Six Nations due to injury, with Harlequins tighthead Sinckler only recently returning to action following a hamstring problem.
The British & Irish Lions forward could come in to contention to replace Dan Cole in the pack for the next game against France on March 10 if he can prove himself during the upcoming training camp.
Wasps wing Daly will also hope to come into contention for the next match but will need to prove his fitness after missing out on playing for his club side last weekend due to an ankle injury.
Head coach Eddie Jones has named a 27-man squad for the next Six Nations outing as they seek to bounce back from their disappointing defeat to Scotland last weekend.
Meanwhile, France have named an unchanged squad ahead of the clash at the Stade de France, deciding against recalling wing Teddy Thomas following a one-game ban for a late-night drinking session after the defeat to Scotland.