Does the Errata for Lucky Egg from May 2010 apply to the newest version of Lucky Egg (SW:Sword & Shield, 167/202) even though the new version was released several years after the Errata and still contains the same text as the pre-Errata version of the card?
No, the newer version of the card should be played as written.
Source: TPCi Rules Team (2024-12-12)
Three cards have been added to the list of errata for the Pokémon Trading Card Game. [...] The text below reflects what the card should say, not what was originally printed. "When the Pokémon this card is attached to is Knocked Out by damage from an opponent's attack and put into your discard pile, draw cards until you have 7 cards in your hand." If the Pokémon does not go to the discard pile (for example, if it goes to the Lost Zone, etc.), you do not get to draw the cards.
Source: TPCi Errata Update (2010-05-07)