AVM FRITZ!Box 7530: New NAND chip?

I've recently acquired a FRITZ!Box 7530 and wanted to install OpenWrt on it. Unfortunately, it failed miserably with a blinking red Info LED. An indicator for this is that the initramfs image does not find any UBI volumes. Since it didn't work after a few restore -> reinstall cycles, I disassembled the device and attached serial console:

There seems to be a different NAND chip, reading and writing fails. It's a KIOXIA (Toshiba) TC58NVG0S3HTA00. Since both, U-Boot and OpenWrt are affected, I've also created an issue at https://github.com/chunkeey/FritzBox-4040-UBOOT/issues/7.

I have not much experience with NAND chips, what can I do to fix this issue?

Here is an excerpt from the boot log where U-Boot fails:

[NAND:] 128MB TOSHIBA 2048 Pagesize 128k Blocksize 1024 Blocks HW
[SYSTEM:] CortexA9 

Eva_AVM >...Device Tree Blob for SubRevision 3 not found.
Using Device Tree Blob of SubRevision 2 

U-Boot 2012.07 [local,r19300-8df161791a] (Apr 03 2022 - 15:56:28)

smem ram ptable found: ver: 1 len: 3
DRAM:  256 MiB
machid : 0x8010001
cdp: get environment part failed
Maximum malloc length: 512 KBytes
mem_malloc_start/brk/end: 0x84140000/84140000/84200000
Relocation offset: 0
NAND:  Not an ONFI device
ONFI probe failed
ID = 1580f198
Vendor = 98
Device = f1
SF: Unsupported manufacturer ff
ipq_spi: SPI Flash not found (bus/cs/speed/mode) = (0/0/48000000/0)
128 MiB
*** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
name         : offset   size    
0:SBL1       : 00000000 00080000
0:MIBIB      : 00080000 00080000
0:QSEE       : 00100000 00080000
0:CDT        : 00180000 00040000
0:QSEE_B     : 001c0000 00080000
0:APPSBL_B   : 00240000 00040000
0:APPSBL     : 00280000 00040000
machid: 8010001
Net:   Configure GPIOSNand Flash error. Status = 12591152
NAND page read failed. page: 57b status ffffffb6
Read 1024 bytes from 02bd800
maca: ca:0:0:0:0:0
macb: 0:cb:0:0:0:0
MAC0 addr:ca:0:0:0:0:0
PHY ID1: 0x4d
PHY ID2: 0xd0b1
ipq40xx_ess_sw_init done
Hit any key to stop autoboot:  3 <0x08><0x08><0x08> 2 <0x08><0x08><0x08> 1 <0x08><0x08><0x08> 0 
Creating 1 MTD partitions on "nand1":
0x01300000-0x08000000 : "mtd=4"
UBI: attaching mtd1 to ubi0
UBI: physical eraseblock size:   131072 bytes (128 KiB)
UBI: logical eraseblock size:    126976 bytes
UBI: smallest flash I/O unit:    2048
UBI: VID header offset:          2048 (aligned 2048)
UBI: data offset:                4096
Nand Flash error. Status = 12595248
NAND page read failed. page: 2600 status ffffffb6

In case somebody discovers it: There really is a new NAND chip which is not properly detected by U-Boot and Linux (it has 128 Byte OOB while only 64 Byte OOB is detected).

The PR for U-Boot is here: https://github.com/chunkeey/FritzBox-4040-UBOOT/pull/8
The PR for OpenWrt is here: https://github.com/openwrt/openwrt/pull/9704