Shouldn’t be any different with etqwpro than with base vanilla config, so just try the usual setup.
Here’s a sample of a working setup for 16 bots:
// Bot settings
seta bot_enable "1"
seta bot_minClients "16"
seta bot_uiNumGDF "-1"
seta bot_uiNumStrogg "-1"
seta bot_balanceCriticalClass "1"
seta bot_sleepWhenServerEmpty "1"
seta bot_skill "2"
seta bot_aimSkill "1"
seta bot_uiSkill "3"
But make sure the setup is actually deployed in the server, this can often be a problem at times with mods (and custom maps). Locate the file etqwpro/etqwdedconfig.cfg and check that it actually have those settings after adding it to server conf. If they’re not there, try to exec the server config from rcon, or edit the file directly when server is not running.