Cant Reach But Makes No Sense

This is a really tricky one to explain, but ive been trying to fix it for a few weeks and im pulling my hair out. Would appreciate any next steps as im stumped;

So I have worked zigbee setup, where I have 21 devices around the house. Mostly phillips hue bulbs. Now I understand that phillips hue bulbs act as repeaters…but thats an aside.

My HA server is in the lounge. I have a phillips hue bulb connects in the porch, which has worked for a year+ never ever fails.

Past the porch, in an outbuilding I have installed 10 ikea bulbs (spots) and 2 phillips hue bulbs. The zigbee integration just wont find any of them…i put all 12 into pairing mode, and it just wont find them. Imust have tried 20 times…ive reset everything…and the the cloest bulb are against the window which is only 10 feet from the porch.

Someone suggested that installing a zigbee repeater at the end of the house + one in the outbuilding would be a soltuons. So I bought 2, and flashed them with repeater firmware. I was able to connect one to the HA instance, but as soon as I moved it to the porch…it was out of range of HA couldnt talk to it. This kinda made no sense to me, as the hue bulb, which is slightly further away and works fine.

As a last resort Ive also installed a Tuya repeater in the porch…still didnt help.

I can see on the zigbee map that the porch light does have other lights connecting to it…but I jst cant understand how its just 10 feet from the outbuilding and none of 12 new lights can connect.

The only thing I can now thing to try is to buy this…

https://www.aliexpress.com/item/1005008742146742.html?spm=a2g0o.productlist.main.2.b2bdEHvNEHvNUU&algo_pvid=6c46c9f2-6a9d-47ac-8cfa-7c245baa05ea&algo_exp_id=6c46c9f2-6a9d-47ac-8cfa-7c245baa05ea-1&pdp_ext_f={"order"%3A"800"%2C"eval"%3A"1"%2C"orig_sl_item_id"%3A"1005008742146742"%2C"orig_item_id"%3A"1005007336536448"}&pdp_npi=4%40dis!GBP!86.57!43.29!!!111.56!55.79!%40210384b917451925849822030ecdd0!12000046480158546!sea!UK!2106027660!X&curPageLogUid=5URHLEIaQVow&utparam-url=scene%3Asearch|query_from%3A

Ill try anything at this point, so any ideas appreciated.