It might be too hot for this now, but I navigated this with sling naps while playing with the toddler. Baby got used to the noise, and then was able to settle in their own crib through the noise eventually.
On bad days, I popped them both in the car and went to McDonalds for drive through coffee for car naps.
Currently a bit older & using white noise, a crib in their own room & baby monitor to manage at home naps in the morning. For the long afternoon nap I allow screen time. This is the only time toddler is allowed it, and we have a simple rule "quiet during tv time". Any loud noises, they get a warning. Second warning and it's turned off. A few times of this (with accompanying tantrums!) and I now have an hour to myself while baby naps & toddler watches tv. I would prefer no screen time but it's saved my sanity and baby's nap! After the hour, if baby hasn't needed to transition to a contact nap toddler & I play. If they have needed a contact nap, I allow a little more TV.
If I need time to get baby down for a nap, I do ten minutes really focused connection with toddler first. I then set up an activity - playdough, stickers, balloons, ice in a bucket, etc., and let them get distracted while I put baby down. Or if they won't play independently, pop baby in the sling and walk the house with the toddler holding my hand, until baby's asleep enough to transfer.
I try do a few buggy naps a week too, just to get out of the house.
Best of luck with it!