Many reasons behind hands-off: The one who likes to provide staff with complete freedom, too-busy boss, apathetic boss, technical expert
Too busy boss: can be extremely busy in his own, having overflowing plate as always, rushing from meeting to meeting, constantly crashing under deadlines
Apathetic boss: no show-up, no single care, also ghosts his own workload to you, provide zero leadership, avoids making decisions, rarely engaged, do bare minimum at last minute
Technical expert: no inclination to manage team, simply highly engaged in his own work