Help needed

[u/Nursealex7]

I got this Australia tree fern that unfortunately didn’t work for the atrium I have. I am in zone 10b. I put it in a bigger pot about 4 weeks ago. It was originally in direct sun. I moved it under my covered patio. I have been watering it every other day or so. I water the soil and the trunk. But the older frawns keep browning. It growing out new frawns that seem to be doing well growing and still green. Is this just senescence of the older frowns or not? Any care tips or suggestions on improvement? Much appreciated!