Yes. If there is no post for a derailleur that means you have to stop the trike and shift the chain from one chainring to another. It's pretty unusual but not unheard of. . The trike made by Penninger may have had an additional part as shown in this picture on Pinterest (
https://www.pinterest.com/pin/150729918748742443/). And from a description on Bentrider dating back to the past
"Penninger advertises the bike as a 64 speed with its eight speed mid-drive system. However, the bike is technically a 128 speed. It does have a double crankset up front that can be shifted by hand, but there is no front derailleur. I’m sure that many of these gear ranges are duplicates, but I never found myself lacking for any high or low gear inches." ::: Penninger Voyager :::
Looks like it was a very expensive trike for one that weighs north of 50 pounds. Interesting though to read how it works. I've heard the name in the past but never saw a picture of one before.