Generally, it’s not recommended to cut lavender’s woody stems back too much, as it can cause damage. However, there’s always a chance your plants may recover. We would suggest waiting to see if there are any signs of life in the next month or so, being sure to not let the plant dry out too much nor get overwatered. If nothing appears after that length of time, then they are likely dead, unfortunately.
Generally, it’s not recommended to cut lavender’s woody stems back too much, as it can cause damage. However, there’s always a chance your plants may recover. We would suggest waiting to see if there are any signs of life in the next month or so, being sure to not let the plant dry out too much nor get overwatered. If nothing appears after that length of time, then they are likely dead, unfortunately.