May I know which ISP you're using?

Yes/YTL Broadband is known to have this issue and still unresolved till now.

TwitterX embeds and videos just appearing blank or won't load?

They even block download from Microsoft runtime installation/redistributable packages.

To confirm and try replay the issue, switch ISP on the same device/browser and reload the page again. See if tweets reappear after this.

Make you you don't disable social trackers under Security/Privacy section of your preferred browser.

Also check your ad blocker settings, make sure the same thing do not disable social trackers.

Third is as said, check which ISP you're using.