I see what's happening but not sure why yet. From your diags, "lspci.txt" we see this:
02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller [10ec:8125] (rev 04)
Subsystem: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller [10ec:0123]
Kernel driver in use: r8169
Kernel modules: r8169
03:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 07)
Subsystem: PC Partner Limited / Sapphire Technology RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [174b:0123]
Kernel driver in use: r8169
Kernel modules: r8169
04:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 07)
Subsystem: PC Partner Limited / Sapphire Technology RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [174b:0123]
Kernel driver in use: r8169
Kernel modules: r8169
I 'bolded' the issue above. For some reason the kernel is assigning the r8169 driver to the RTL8125 device instead of the r8125 driver. 'googling' this reveals it's a known issue, eg,
https://bbs.archlinux.org/viewtopic.php?id=274481
https://github.com/awesometic/realtek-r8125-dkms/issues/7