On a random note,
The work GPs and the staff do is way more than just seeing patients. I'm not sure how much the public realise this.
The GPs often work late and don't have lunch breaks.
Their slots are strictly governed - how they're filled, how many etc. Often they do the other work in their lunch hour.
There's f2f apps, phone apps, referrals, letters, meetings (this can be in house, online, phone or in person), unofficial meetings (such as contacting a social worker to discuss a patient), emergencies, home visits, sick notes, forms (eg fit to travel)? Reports (child protection etc), prescriptions, medication reviews (where pharmacists can't do this). At my practice there's also trainees so the GPs have to double check their work, give them support, mentoring etc. Then there's appraisals, even admin like filling in their CPD log takes time,.. and so much more.
It's not unusual for a GP to work from 830am-730pm, go home and continue to work.
And the reason receptionists ask why you need an app is literally for triage - to see if it's something the nurse, physio etc can deal with.