Why did Queen Victoria have to accept democratic and economic
reforms?

Queen Victoria restored the reputation of a monarchy tarnished by the extravagance of her royal uncles. She also shaped a new role for the Royal Family, reconnecting it with the public through civic duties.

At just 4ft 11in tall, Victoria was a towering presence as a symbol of her Empire. She and her husband Albert and their nine children came to symbolise a new, confident age.
24 May 1819

It was mainly because of her royal uncles so she had to be in a new role for the Royal Family, reconnecting it with the public through civic duties.

The muslims ruler the mandated and cultural toleration was osman