For the RoHs 3 Compliance data you can follow the instructions in the link that provided below.
For your information, EPCQ4ASI8N is still active and available. Anyhow, the life cycle is depending on its order volume.
You can subscribe to our customer notification mailing list at below link so that you can be notified when an Altera(now Intel) device is going to be discontinued.
For the remaining question, you can contact Intel local sales/distributor https://marketplace.intel.com/s/pmp-partner-program/a723b0000008PICAA2/distributor?language=en_US
As we do not receive any response from you on the previous question/reply/answer that we have provided, please login to ‘https://supporttickets.intel.com’, view details of the desire request, and post a feed/response within the next 15 days to allow me to continue to support you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you on your follow-up questions.