Generally YES. That is just surface moisture. It will dry out as long as your roof is properly VENTED.
When you say decking, do you mean 23/32 (3/4” nominal) that is used for underlayment attached to the floor joists?
If that is what you are referring to the answer is yes.
That is because the glue holding it together is waterproof.
It also has a sealer on edges. So, it is made to be exposed to weather for awhile. That does not mean two years.
The same goes for 7/16” or 15/32” roof sheathing. It is made to be exposed for a few months. The most important thing is the roof is VENTED properly. Also, that the roofer puts a synthetic underlayment over the sheathing and Ice and water shield is typically put 6’ up from the eaves and all valleys.
I just had my roof replaced on my 1972 house. The previous three tab asphalt shingle was installed in 1997. My roof has two different pitches. 7/12 and 4/12 on the dormers. I had them cover the entire dormers with ice and water shield.
It only costs about another $100 for another roll.
Thanks again.