Maximum yield for outdoor autoflowers is heavily influenced by a combination of genetics, climate, and, most importantly, the timing of the grow to maximize sun exposure. Seed banks often suggest 35g to 250g+ per plant, achieving the upper end requires optimizing several variables, making precise, universal guessing difficult.
The more knowledge you have and the better you can maintain optimal conditions and apply them and keep the entire process cycling, do this and the bigger yields will come. Its easy to assume its easier outdoors, given that nature usually knows best. But even 1 week of waterlogged soil during flower can destroy entire crop whether its indoors or out.
Gluck.