In your config you have:
csv_timestamp_column = ["collectionBeginTime"]
That should be a string, not an array. In either case this is what I did:
[[inputs.file]]
files = ["data.csv"]
data_format = "csv"
csv_header_row_count = 1
csv_delimiter = ","
csv_timestamp_column = "collectionBeginTime"
csv_timestamp_format = "2006-01-02 15:04:05-07:00"
[[outputs.file]]
collectionBeginTime,NEID,MU,hostname,Granularity,SampleInterval,suspectFlag,ifIndex,ifDescr,ifOutOctets,ifOutUcastPkts
2022-01-29 17:05:00+02:00,NE=2100724,LINUX_IF,192.168.99.2,60,60,0,3,eth10,366786256,0
file,host=ryzen Granularity=60i,SampleInterval=60i,ifIndex=3i,ifOutOctets=366786256i,NEID="NE=2100724",MU="LINUX_IF",hostname="192.168.99.2",suspectFlag=0i,ifDescr="eth10",ifOutUcastPkts=0i 1643468700000000000
The UNIX timestamp of 1643468700 converts to Jan 29, 2022 as reported in the CSV file. While I am using the file plugin above, you can convert to using tail and add-in options as you get things working.
