Tracey,
Great question! According to this Tracfone support page, Wi-Fi calling is supported after registering your E911 address with them, with a Wi-Fi calling SIM card.
Wi-Fi Calling - TracFone Wireless
Note that Wi-Fi Calling is a feature that allows you to use Wi-Fi to make or receive a phone call in areas with limited cellular signal. It isn't going to impact your cellular data, and only works when also connected to a Wi-Fi network.
Make a call with Wi-Fi Calling - Apple Support
Were you able to Reset Network Settings as outlined at the end of the article we showed you? If you were, did you notice an improvement in your cellular connection?
Take care.