Use semicolons to separate items in a series if they contain commas. In some cases, it is a good idea to separate lists with semi-colons if the items are very long and complex—even if they do not contain any internal punctuation.
Examples:
Letter, Number Sets:
The answers to the test are 1, D; 2, B; 3, A; 4, D; 5, C; and 6, A.
Noun, Description Sets:
The winners were surprising: Amy, who placed last during the first test; Connor, who was sick for most of the semester; and Tamar, who has been sleeping through practice recently.
City, State Sets:
Mary has lived in Los Angeles, California; Seattle, Washington; and Portland, Oregon.
Long Items:
Joseph has several personal conflicts that he hopes to address with his therapist including his relationship with his ex-wife upon her agreement to a shared custody arrangement for their two children; his hopes to be promoted in his position at the accounting firm that just hired him last month; his desire to be a more compassionate and patient father to his children despite the dissolution of his marriage; and his hopes to develop a more robust spirituality through learning new parenting skills. (https://www.grammarbook.com/blog/semicolons/semicolon-use-in-lists/)
