Use peco (https://github.com/peco/peco) to search ZSH's history via ctrl+R

zsh-history-search-with-peco.zsh

if [[ "$(command -v peco)" ]]; then
# Search shell history with peco: https://github.com/peco/peco
# Adapted from: https://github.com/mooz/percol#zsh-history-search
  function peco_select_history() {
    BUFFER=$(fc -lnr 1 | peco --initial-filter Regexp --query "$LBUFFER")
    CURSOR=$#BUFFER # move cursor
    zle -R -c       # refresh
  }

  zle -N peco_select_history
  bindkey '^R' peco_select_history
fi

Using the quicker command rather than which to see if peco installed and -r rather than tac etc to reverse the history.