This should allow for an infinite draw, however if we assume our players do manage to fill the bottom row eventually, things change.

The lowest layer will be filled with sections that never have any more than three in a row.

If the board is even-infinite, player 1 will have the better chance at manipulating the upper layer in their favor.

If odd-infinite, then player 2 gets the advantage.

My guess is that the only way to never win is to find a tesselation pattern in which there is an equal number of each stone and no connect fours for anyone even when repeated on either side. The players would have to play that pattern perfectly and I’m not sure either would be inclined to do so.

you didn’t account for the heat death of the universe happening long before the materials needed to produce enough pieces run dry to satisfy rows 1-3.

also since it seems linear, there may be an alternative solution to align the edge of the board with another reality to present artificial borders