Have you tried forgetting the Network in your phone's settings and then reset up the connection between your phone and Home Broadband Wi-Fi.
Occasionally splitting the frequencies in your Home Broadband Router to 2.4ghz and 5ghz and then switching between them when connecting to Wi-Fi on your phone can help.
As a process of elimination try connecting to another source of Wi-Fi such as a friends or family members Wi-Fi connection or a coffee shop etc.
If all else fails then perhaps let a Samsung Experience Store or Samsung Service Centre take a look.
Some help links …
I wish you all the best with this.
Current Phone > Samsung Z Fold³ 5G.