Actually it really depends on your needs, there are 3 types of UI frameworks you can use:
A complete set of UI components like: https://react-bulma.dev/en/getting-started.
Having a lot of pre-built UI components saves a lot of time
need to learn the react framework and the bulma styles, and it's harder to customize to your needs
A pure css framework, like Bulma, where you write all the components yourself.
A lot of flexibility to build the components you need
You are bound to Bulma classes and markup.
Takes more time since you need to build the components
A utility class framework like: https://tailwindcss.com/.
Most flexible, mix and match classes as you like and build your own markup
Very easy to customize to your needs
Might take time to get used to and takes more time since you need to build the components
If you choose options one, then it's just a matter of deciding what style you like (material,ant, bulma) and go with the library that implements it
If you go with pure css and build your own components, I can't recommend tailwind enough,
I've been finding myself building entire pages without writing a single line of css.
And if later on, the designer wants to make a change to some color, or size, I just need to change one value in the config file, and the entire app is updated.