I did follow those steps and I get, these errors, how to fix?
Fixed it by removing php sources.
But why it uses php 7.4?
Err:1 https://packages.sury.org/php bullseye/main armhf php8.3-curl armhf 8.3.2-1+0~20240120.16+debian11~1.gbpb43448
404 Not Found [IP: 143.244.38.136 443]
Err:2 https://packages.sury.org/php bullseye/main armhf php8.3-intl armhf 8.3.2-1+0~20240120.16+debian11~1.gbpb43448
404 Not Found [IP: 143.244.38.136 443]
Err:3 https://packages.sury.org/php bullseye/main armhf php8.3-mysql armhf 8.3.2-1+0~20240120.16+debian11~1.gbpb43448
404 Not Found [IP: 143.244.38.136 443]
Err:4 https://packages.sury.org/php bullseye/main armhf php8.3-fpm armhf 8.3.2-1+0~20240120.16+debian11~1.gbpb43448
404 Not Found [IP: 143.244.38.136 443]
Err:5 https://packages.sury.org/php bullseye/main armhf php8.3-gd armhf 8.3.2-1+0~20240120.16+debian11~1.gbpb43448
404 Not Found [IP: 143.244.38.136 443]
Err:6 https://packages.sury.org/php bullseye/main armhf php8.3-pgsql armhf 8.3.2-1+0~20240120.16+debian11~1.gbpb43448
404 Not Found [IP: 143.244.38.136 443]
E: Failed to fetch https://packages.sury.org/php/pool/main/p/php8.3/php8.3-curl_8.3.2-1%2b0%7e20240120.16%2bdebian11%7e1.gbpb43448_armhf.deb 404 Not Found [IP: 143.244.38.136 443]
E: Failed to fetch https://packages.sury.org/php/pool/main/p/php8.3/php8.3-intl_8.3.2-1%2b0%7e20240120.16%2bdebian11%7e1.gbpb43448_armhf.deb 404 Not Found [IP: 143.244.38.136 443]
E: Failed to fetch https://packages.sury.org/php/pool/main/p/php8.3/php8.3-mysql_8.3.2-1%2b0%7e20240120.16%2bdebian11%7e1.gbpb43448_armhf.deb 404 Not Found [IP: 143.244.38.136 443]
E: Failed to fetch https://packages.sury.org/php/pool/main/p/php8.3/php8.3-fpm_8.3.2-1%2b0%7e20240120.16%2bdebian11%7e1.gbpb43448_armhf.deb 404 Not Found [IP: 143.244.38.136 443]
E: Failed to fetch https://packages.sury.org/php/pool/main/p/php8.3/php8.3-gd_8.3.2-1%2b0%7e20240120.16%2bdebian11%7e1.gbpb43448_armhf.deb 404 Not Found [IP: 143.244.38.136 443]
E: Failed to fetch https://packages.sury.org/php/pool/main/p/php8.3/php8.3-pgsql_8.3.2-1%2b0%7e20240120.16%2bdebian11%7e1.gbpb43448_armhf.deb 404 Not Found [IP: 143.244.38.136 443]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?