Air carrier technician reported during an ETOPS pre-departure check; they found several areas on the lower right side fuselage covered with speed tape. They found several lightning strike damages under the tape that were undocumented.

Narrative

Day 0 aircraft scheduled for trip Etops to ZZZZ; myself and two other AMTs were assigned to accomplish the PDC. Prior to going out to the aircraft as I always do I review the documents to make a mental note of what is already being tracked. When approaching aircraft I we discovered multiple areas of speed tape on the lower fuselage right side from the NLG to the leading edge (LE) of the wing. Once we verified again there was NO tracking documentation for the presence of the speed tape we started are evaluation to find out why it was present. Peeling back the speed tape we discovered extensive lightning strike damage to the fuselage skin and the heads of hi-loc fasteners. Most of the skin damage were dime to nickel in size burn marks with fiber ply damage. The damage to the fastener heads were large spots of melted material. After researching history the most current documented lightning strike event was 4 months ago at ZZZ1. The lightning strike inspection card in Company database reflected no damage found. It has become all to common to discover speed tape applied to areas on the aircraft with no tracking information; but to find something of this serious in nature is very disturbing. If an individual is capable of covering up something of this nature; what else are they willing to do; they DO NOT belong working in this industry!