Barman58 said:
There is a section, (forum), that deals exclusively with the Insider program so most updates will be found there https://www.tenforums.com/windows-insider/

The last Release Preview was issued at the end of August/start of September, 2019, (I am on the Insider Release Preview), and the next is due in a few months when I am sure these will be reported either in News or the Insider forum
That is why I asked. They were a monthly thing.