iOS Nextcloud App Issue

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Can anyone tell
Me if its possible to upload pics and videos from iPhone to nextcloud even when display turns off?
I have 15k photos on my iPhone and I cannot have the display turned on 24hrs/day:-)

Also I’m wondering why my pics and videos are still uploading evenwwhen I configure my nextcloud spp to only upload when wlan is available but in my case it’s still uploading when mobile data are only used?!?