FYI
Those going to Vietiane for visas.
I'm reading in other places that the booking system is full and no appointments are available until the 13th March. Some say 19th March. I've not tried the system myself.
I suggest not leaving it until the last minute.
TLDR : Answer Summary
There are reports that the booking system for visa appointments in Vientiane is currently full, with the earliest available slots reportedly on March 13th or March 19th. Some people have experienced longer waits, with comments indicating that locals may be reselling appointment slots. Alternatives such as Savannakhet are suggested for visa processing without needing an appointment. A concern about the number of slots available daily has also been raised, hinting at changes in the handling capacities at the embassy.