Yes and no….
The Trails that the guides tend to ride are either accessible to everyone or on private land. The advantage is that you generally get a lift to the top.
Spent 12 days there last year (or was it the year before that?) with the van. That gave us the opportunity to park up near to the trail head/end of the trail, saving ourselves the slog out of town.
Nato Base, Isallo Trail and Melongo/Rollercoaster trail heads are a fair way from Finale. Comfortable enough climbs but factor in >1000hm and 20-40km to get there.
We went on an uplift day and all bar one trail was in the hinterland on hand shaped trails on private land. Riding was good, the guide not so. Seemed more interested in his Strava times than the group. But, it did open our eyes to what is available in the back of beyond.