@JOduMonT if the simple GET to / of the application exceeds 7seconds, then likely increasing the timeout just hides some other underlying issue.
Since the logs show n8n, but you mention searxng and this is the openwebui forum section. I am not sure how all those got connected, maybe you can give more context how these play together and what may cause such high response times.
Also if the healtheck takes so long, is the app otherwise in any way usable then? Could also be that only this healthcheck took that long and other requests (which do actual things in the app backend) have entirely different issues?