Too few peers, too slow syncing

Hello everyone, I have UmbrelOS 1.4.2 installed on my Raspberry Pi 4 and BitcoinKnots with the latest version. However, the syncing takes a very long time and I usually have no more than 3 peers. According to bitnodes.io, I am reachable on port 9333. Is that why I have so few peers? Before, I had Umbrel0.5 and the syncing was much faster. What can I do to make it faster? Maybe someone can find something in the log file..? umbrel_bitcoin-knots_2025-07-10_13-26 - Pastebin.com

Thanks