regex101: PCRE (Legacy) Substitution Workspace

Regular Expression

^(?:[^,\r\n]*,){2}="(\d+)".*

New

originalscrape,scrapeDate,userId,username,full_name,is_private,follower_count,following_count,media_count,biography,hasProfilePic,external_url,email,contact_phone_number,address_street,isbusiness,Engagement %,MostRecentPostDate,AvgLikes,AvgComments,category,businessJoinDate,businessCountry,businessAds,countryCode,cityName,isverified
,07/03/2020 05:54 AM,="189389157",stronger_together_forever,stronger_together_forever 🌈🏖☀️,False,0,0,0,,False,,,,,No,0,Has no posts.,0,0,,,,,,,No
,07/03/2020 05:54 AM,="51807820",aaronistattoo,Aaron Is.,False,0,0,0,,False,,,,,No,0,Has no posts.,0,0,,,,,,,No
,07/03/2020 05:54 AM,="194962598",djcoley727,djcoley727,False,0,0,0,,False,,,,,No,0,Has no posts.,0,0,,,,,,,No
,07/03/2020 05:54 AM,="4182106610",cesararce1985,Cesar Arce,False,0,0,0,,False,,,,,No,0,Has no posts.,0,0,,,,,,,No
,07/03/2020 05:54 AM,="8957742561",minkwhiz,𝕄𝕚𝕟𝕜𝕎𝕙𝕚𝕫,False,0,0,0,,False,,,,,No,0,Has no posts.,0,0,,,,,,,No

Extraction

originalscrape,scrapeDate,userId,username,full_name,is_private,follower_count,following_count,media_count,biography,hasProfilePic,external_url,email,contact_phone_number,address_street,isbusiness,Engagement %,MostRecentPostDate,AvgLikes,AvgComments,category,businessJoinDate,businessCountry,businessAds,countryCode,cityName,isverified
,07/03/2020 05:54 AM,="189389157",stronger_together_forever,stronger_together_forever 🌈🏖☀️,False,0,0,0,,False,,,,,No,0,Has no posts.,0,0,,,,,,,No
,07/03/2020 05:54 AM,="51807820",aaronistattoo,Aaron Is.,False,0,0,0,,False,,,,,No,0,Has no posts.,0,0,,,,,,,No
,07/03/2020 05:54 AM,="194962598",djcoley727,djcoley727,False,0,0,0,,False,,,,,No,0,Has no posts.,0,0,,,,,,,No
,07/03/2020 05:54 AM,="4182106610",cesararce1985,Cesar Arce,False,0,0,0,,False,,,,,No,0,Has no posts.,0,0,,,,,,,No
,07/03/2020 05:54 AM,="8957742561",minkwhiz,𝕄𝕚𝕟𝕜𝕎𝕙𝕚𝕫,False,0,0,0,,False,,,,,No,0,Has no posts.,0,0,,,,,,,No