Yes he can. A 16 years old Jakob took gold in the 1500 + steeple + 5000 + 800 bronze in 3 days at norwegian championships in 2017. He also ran a Diamond league meet in Zurich the day before this championship started on 24th august, and flew back to norway the same day to run the 800 prelims and the 5k final (13:35) the day after. The next day he did the 800 final, the 1500 prelims and won the steeple final, and the next day he won the 1500 final. If that wasn’t enough he returned 4 days afterthat for youth norwegian championships and took silver in the 400 and gold in the 3000m with less than 1 hour between the two races.
And he is now 5 years older and way stronger. Obviously he won’t be able to do the 800 at this level but the rest would be easy work and the only medal that isn’t absolutely guaranteed is gold in the 1500m. In fact that’s the reason he probably wouldn’t do it at that level if the 1500m isn’t before the other races, he doesn’t want to lose it.