In my case the power is good. If booting from SD then SSD works fine.
[ 4.162423] ahci-sunxi 1c18000.sata: supply ahci not found, using dummy regulator
[ 4.170208] ahci-sunxi 1c18000.sata: supply phy not found, using dummy regulator
[ 4.235467] ahci-sunxi 1c18000.sata: controller can't do PMP, turning off CAP_PMP
[ 4.243013] ahci-sunxi 1c18000.sata: forcing PORTS_IMPL to 0x1
[ 4.248930] ahci-sunxi 1c18000.sata: AHCI 0001.0100 32 slots 1 ports 3 Gbps 0x1 impl platform mode
[ 4.257929] ahci-sunxi 1c18000.sata: flags: ncq sntf pm led clo only pio slum part ccc
[ 4.267230] scsi host0: ahci-sunxi
[ 4.271169] ata1: SATA max UDMA/133 mmio [mem 0x01c18000-0x01c18fff] port 0x100 irq 45
[ 4.287675] of_cfs_init
[ 4.290317] of_cfs_init: OK
[ 4.293399] ALSA device list:
[ 4.296428] #0: sun4i-codec
[ 4.593884] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 4.600379] ata1.00: ATA-8: APPLE SSD TS128B, AGAA0206, max UDMA/100
[ 4.606779] ata1.00: 236978176 sectors, multi 16: LBA48
[ 4.612330] ata1.00: configured for UDMA/100
[ 4.617284] scsi 0:0:0:0: Direct-Access ATA APPLE SSD TS128B 0206 PQ: 0 ANSI: 5
[ 4.626411] sd 0:0:0:0: Attached scsi generic sg0 type 0
[ 4.626715] sd 0:0:0:0: [sda] 236978176 512-byte logical blocks: (121 GB/113 GiB)
[ 4.639453] sd 0:0:0:0: [sda] Write Protect is off
[ 4.644408] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 4.654860] sda: sda1
[ 4.658710] sd 0:0:0:0: [sda] Attached SCSI disk
[ 4.668643] Freeing unused kernel memory: 1024K
[ 4.675773] Run /init as init process
The problem persists on the Armbian 21.08.1 Hirsute with kernel 5.16.9