So, to try and get the thread back on track, I have noticed more and more IC components are not even available for backorder, for example the BME280 (temperature, humidity, and pressure sensor) from Bosch. All types of packaging stock dropped and dropped until Digi-Key won't accept any orders at all.
In preparation for this, I am being forced to stockpile and where not possible, to make multiple designs using alternative (less suitable) components simply to be able to ensure continued production. I have a small amount of stock, but it seems plain now that this will not see me until stock returns.