Discovery via MQTT bridge with remapping

hi
for my networking i use MQTT with bridges.
in order not to have everything in the ‘/’, i now wanted to work with remapping. [1]

topic # both 0 "" garden/

it works.
however, the discoveries no longer end up in ‘/homeassistant/’ but in ‘/garden/homeassistant/’.
Home Assistant does not find the devices this way.
is there a way in Home Assistant that it also searches in ‘/garden/homeassistant’?
i was hoping that i would define a “garden” area and then Home Assistant would search in that area as well.

with esphome i can use the ’ topic_prefix’, but to do this i have to reflash each device.

topic_prefix: ${location}/${nodename}

[1] Mosquitto MQTT Bridge-Usage and Configuration