It can be very common to still have some swelling underneath the eyelids after an eyelid lift and fat transfer one month after the procedure. It is also extremely common to have asymmetry between the sides. If you have concerns, I would suggest speaking with your surgeon, but in all likelihood, your concerns should continue to improve as the healing process continues. If there is still lumpiness several months after the procedure, small refinements can often be made.
At one month you are still healing and may feel some irregularities where the fat was placed. This should soften and smooth out with time.
One month after a lid procedure and fat injection, it is not uncommon for you to feel lumps. This may get better with time, but you should follow closely with your surgeon.
Sats you are too early in the healing process to begin worrying about your final result. Fat transfer is known to be associated with significant swelling which can last for months. I recommend following up with your PS to be sure but your swelling will reduce as the months pass. The lumpiness you describe could be part of the swelling or a separate issue. Again your PS should be able to guide you through this.