Only options to achieve this without flows (delays) and on the Zigbee network of Homey is to use Zigbee Touchlink capable devices.
Either a wall controller (battery powered, but will replace the existing switches) or an 3-wire in-wall dimmer (requires pulling cables).
Alternative is using a Hue hub and linking your lights to the hub and the hub to Homey (2 separate Zigbee networks).
Final alternative (using flows), is connecting a Aqara remote to the existing switches (search the forum for hack guide)…
