[ddol]

Have you considered using a power on delay relay? There are many for refrigerators that feature a ~5 minute delay and are quite affordable ($6[0])

[0] https://www.scandifurn.com/product-p-328426.html

[Animats]

I could, but that won't handle the case where the fiber link goes out for a non-power reason and resets. Both events are rare, though.