Part of that depends on the type of advice or guidance. Some of it might be a symptom of the project's bus factor being too low (inadequate documentation, ambiguities or holes in processes, etc), which your organization can fix by paying down some of that technical/process debt. Other forms of advice (career-related, higher-level tech stuff, etc) would seem more like a mentor role. For that stuff, you may want to schedule "mentor time" in a slot advantageous for yourself, such as the last hour of the day.