As Matt says, you have put yourself in a bad position; also Matt has put forward a bit of remedy:
To move the intake (air)nozzle a bit upward to get some downward flow of the char.
Otherwise you cannot get char from the air-nozzle side to “voluntarily” flow toward the output.
To avoid “fresh” wood settling in front of the outlet, you have to
establish a “valve” (vault) from the outlet-side to 1/3 diameter of the bucket from the nozzle-side.
Put 3 – 4 nozzles in parallel instead of one; otherwise fresh fuel will bypass a single nozzle (as seen from above) along the “nozzle sector” of the bucket.
Seen horizontally, the nozzle beams should aim just under the edge of the vault, to exclude creeping pyrolyse gases to “join the party”!..
Hope you remember, that “the cold in” air is~ 60% of the cold out gas…
Just for nozzle measurement and velocity calculations…