Hello there are two way
1) used the width to expand as per dropdown options (I have attached OML and Demo link for this )
2) used CSS and set overflow-x -scroll so it will overflow ( add same class as below in that add class overflow=scroll and width as per your requirement)
For 1 scenario : DEMO Link
Note :If you want apply to all DD then
.choices__list.choices__list--dropdown {
border-radius: var(--border-radius-soft);
width: 600px; //(give as per your requirement)
}
and if you want to apply for 1 on the list then wrap that in the container and extend that class as I done in the OML
hope this will helps you,
Thanks and Regards,
Akshay Deshpande