My environment

[env:heltec-display]   ; Heltec ESP32 Board with SSD1306 display
platform = ${com.esp32_platform}
board = heltec_wifi_lora_32_V2
build_type = debug
monitor_filters = esp32_exception_decoder
board_build.partitions = min_spiffs.csv
extra_scripts = pre:scripts/omg_firmware_version.py
lib_deps =
  ${com-esp.lib_deps}
  ${libraries.wifimanager32}
  ${libraries.heltec}
;  ${libraries.m5stickcp}

build_flags =
  ${com-esp.build_flags}
  ${test_env.build_flags}
; *** OpenMQTTGateway Config ***
  '-UZmqttDiscovery'          ; disables MQTT Discovery
  '-DvalueAsATopic=true'
  '-DLOG_LEVEL=LOG_LEVEL_TRACE'
; *** OpenMQTTGateway Modules ***
  '-DZboardHELTEC="HELTEC"'
; *** Heltec Board Options ***
  '-DDEBUG_OLEDDISPLAY(...)=Serial.printf( __VA_ARGS__ )'
  '-DLOG_TO_LCD=true'         ; Enable log to LCD
  '-DLED_ERROR=2'
  '-DONBOARD_LED=25'          ; Onboard LED is GPIO 25 on the Heltec Board

monitor_port = /dev/cu.SLAB_USBtoUART
monitor_speed = 921600
upload_port = /dev/cu.SLAB_USBtoUART
upload_speed = 921600

Switched to the thingpulse/ESP8266 and ESP32 OLED driver for SSD1306 displays@^4.3.0 library which was the base for the Heltec library.

This fixes multi-line display

1 - Set default LCD log level to WARNING
2 - Implemented a macro based displayPrint function that will be usable across different displays