Miraculous World Network also confirmed that you only need to watch Optigami to understand these two episodes. We do not need to see episodes 5, 9, and 10 first. This likely means that we will be seeing Alya with Trixx.
On the same website, the English dates for Mr. Pigeon 72, Sole Crusher, and Optigami were released. Here they are:
Mr. Pigeon 72 – June 24th, 10:00am EST
Sole Crusher – June 26th, 10:30am EST
Optigami – July 17th, 10:30am EST