It's called "manual duplex". Even if your printer driver does not support the hand-holding steps, you can just go in the page selection of your word processor print dialog and select the odd numbered pages explicitly - for example 1,3,5,7,9,11 and after printing turn the stack over & select 2,4,6,8,10,12 & put the paper back in the printer.
I ditched my Canon inkjet which had a duplexer and bought a cheap Canon laser printer for less than the cost of the inkjet cartridges. This has no duplexer and manual duplex works just fine.