You can change your DNS or use DNS encryption too in the future, especially if you don't have access to a good VPN. It is quite easy to set up and there is open-source software for that, some browsers have options to change DNS too if you don't want to download anything. I don't think they will fix it since it is a problem on Twitter's end, or more accurately your country's ISP. CMIIW.
Hmm I did not think of an alternative method to unlock restricted sites, but I will give DNS a try if it will work, I tries to search some articles on it, but nothing handy came up, but I have a video tutorial in mind, shared by a local airdrop influencer on his TG group, I did saw that video but did not tried the method because I afraid to lose my account. But VPN is also doing the same so I think changing the DNS or other settings might not affect my account at all.
But still thanks for bringing this in front, as I was not thinking of an alternative while I should, the thing is, twitter is working on some networks, like here we have PTCL, and it works on some networks, even it works on my devices sometimes without the VPN but mostly I have to use VPN.