I assume you node is in Sync?
yes indeed, 100% sync
Is the mempool you are using, is it your local mempool or a online website?
both, local mempool and the mempool.space website provide same output. That's is actually really weird because the channel was open since over a year... not sure it was routing but it was definitely open.
In thunderHub can you look in your transactions section and see if you can find the opening transactions manually?
Look's like there's no transaction history older than a month, since when the force closures!
What does amboss space show for these channels for your node?
Two of the peers node are still having the channel as open when I check 1ml, same on amboss. The other node (the one that give me error on the opening transaction ID) does not have the channel active anymore, nor is appearing in its list of closed channels