Its happening and accelerating: https://climate.nasa.gov/vital-signs/sea-level/
If you need something visual look at the Miami type floods.
Also consider this is an issue that needs to be planned across hundreds of years. It might be slow but we dont move a city like NY in a decade.
Look at this: https://sealevelrise.org/states/new-york/#:~:text=The%20sea%....
Genuinely, do you feel these links are alarmism and propaganda?