Welcome to HCM.
Your surgeon had advised you correctly, to ignore them.
Now that some of them are increasing in size, better option would be to get an excision biopsy
done of one of the lipomas
which has increased in size recently.
Occasionally a lipoma may turn malignant. The usual site for lipomas to become malignant are the ones located on the back near neck and shoulder and those in the thigh region.
Wish you all the best.