Short answer: Yes.

USCIS says:

TPS for current beneficiaries under the designation for Nepal will continue if they properly re-registered for TPS during at least 1 of the following registration periods for their country. If you did not re-register during at least 1 of the following registration periods, you should file now and explain your reasons for filing late.


So if you re-registered between Oct. 26 -Dec. 27, 2016 and were approved but did not re-register in 2018, you still have valid TPS status.