I found an interesting site (laws of the nature). This site contains a lot of reading material on the Dhamma. Of course, like many Dhamma sites, it uses poor translations and misinterpretations of key concepts. This is an inevitable situation. However, some information may be useful.
This site is a decade old. The author is Mr. Martin Barua. It seems like he hasn’t updated it in a very long time. I tried to contact the author by email but his address is having problems.
Long after Lord Gautama’s teaching has disappeared from the human world, many beings will attain Nibbāna. As long as the relics of Lord Buddha remain. However, it will only be divine beings such as devas and brahmas. The relics will come to life temporarily and teach the Dhamma to a multitude of devas and brahmas. The vast majority will have varying levels of magga phala. The relics will be destroyed and that will be the end of Lord Gautama’s sasana. Those who remain will be reborn in the time of Lord Metteya.
Here the link for this information The duration of Gotama sasana (Dispensation)
Here information on the apayas