Redirecting multiple domains to one domain

I have three domains. Domain 1, 2 and 3.

I want to redirect domain 2 and 3 to go to domain 1.

I have a droplet setup, and everything works fine for domain one. Site loads.

Current setup to redirect domain 2 and 3 to one:

DNS Two A records for each, pointing to the domain 1 droplet. A record with WWW and one without.

NGINX Setup:

server {
    listen 80;
    server_name www.domain3.com domain3.com;
    return 301 https://www.domain1.com$request_uri;
}

server {
    listen 80;
    server_name www.domain2.com domain2.com;
    return 301 https://www.domain1.com$request_uri;
}


server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name domain1.com;
    root /home/forge/domain1.com/public;

It seems to be working for me. For others, it’s not working when links are sent to them. Sometimes it works if they re-type it in their browser. Eventually, after a while, they seem to all work though. A few times I’ve noticed it loads the site, but isn’t changing the URL.

Is this just taking time to propagate? Or is this setup incorrect but works in some cases.