Match Bug

This is an issue with APEX. I'm playing on PS5.

It's difficult to play smoothly with friends.
The main phenomena are:
・Unable to accept a friend's invitation
・Even when joining a party, only I can't get matched
・Not matching with friends
　→ Only I get matched and enter the game
　→ Only my friends get matched and enter the game
This happens whether I have one friend or two. This happens whether using wired or wireless connections.
After about 10-20 minutes of repeating the above issues, I can sometimes get a match. After that, I can play consecutive matches with my friends using the party queue. However, even during consecutive matches, I occasionally get kicked out of the party and matched alone. When that happens, I have to repeat the above steps.

Below are the troubleshooting steps I've taken:
・Restarting the router
・Reinstalling the game
・Switching between wired and wireless connections
　→ When wired: UGREEN LAN Cable Category 7 5M RJ45 Connector Gigabit 10Gbps/600MHz CAT7 Compliant Ethernet Cable STP (Product link: https://www.amazon.co.jp/dp/B07C7PWZVQ?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_4&th=1)
・Restarting the game (e.g., closing the game when it fails to match)

My network environment details are as follows:
・I use NURO Hikari for my internet connection. My upload and download speeds are as follows:
　→Upload around 800, download around 300.
・Both my NAT type and my friends' NAT type are Type 2. UPnP is enabled.

I haven't found anyone else with similar issues online, and I'm really struggling with this.
I've been playing Apex since Season 2 and love the game, so I'd really appreciate any advice on how to fix this.

I'm Japanese and used DeepL to create this text.