Do you do any additional bodyweight exercises?

I love the BDP for its simplicity, have been at it almost one month.

I'm curious what might be the most important other exercises for muscle groups the BDP doesn't work? I like to have as few as possible things to do, I love the model of doing a single movement as many times as possible in X minutes to build strength. I'm thinking of adding some other things similar to the set of pullups, if there are important muscle groups that may be missing out.

I've seen comments that BDP doesn't work the legs much, and as I had a knee injury in the past (slight torn ligament I think), I specifically wonder what might be good for strengthening the leg/knee so it's less prone to that kind of injury, without the impact risk of running and backpacking.

Edit: I do a set of pullups every day till almost failure, I misunderstood that as being "part of" the BDP.

Also - I'm only interested in calisthenics / no equipment required - I live in the woods and have no gym or training equipment, though I use a tree branch for pullups, and I need to workout while traveling without a gym.