How to lower my others storage?

here is the support article for high other storage..

Clear Other storage on your iPhone or iPad - Apple Support

but it looks like you've already updated beyond 13.6.1

If you check your iPhone storage..

How to check the storage on your iPhone, iPad, and iPod touch - Apple Support

do you see a loading wheel of some sort having to do with iCloud photos? might say 1% by it?

If so, try connecting to a good wifi network, plug in your phone, turn off low power mode, let your phone lock (so best to do this overnight while sleeping). see if it sorts itself out..

otherwise you might need to contact support

Get Support