My 22 month old still doesn't self settle and DD only does occasionally at 4 months. It depends on the child.

DS started with being fed to sleep, progressed to being rocked to sleep and now goes to sleep with one of us lying next to him. He occasionally goes to sleep on his own.

DD is fed to sleep but will fall asleep on her floor mat when she is tired (DS NEVER did this ) I believe she will self settle before DS. She still has sketchy day sleeps - power naps until last week. This week they are a little longer (and longer still if she is in a sling on me).

Each child is different and learns to sleep in their own way and in their own time. I can fall asleep anywhere / anytime but DH has different sleep cues that require specific settings (pillow, bed and night time primarily ) If you have no problem with feeding to sleep then do it. I chose the path of least resistance and settled the quickest and most convenient way for baby and me. It meant they cried less and I got more sleep